8 4 noun n noun
• a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
Example sentence • Many aircraft and spacecraft use titanium for its durability.
9 3 noun n noun
• a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
Example sentence • Consuming excessive amounts of strontium can lead to health complications.
10 5 noun n noun
• a hospital for recuperation or for the treatment of chronic diseases
Example sentence • She spent several months in a sanatorium recovering from tuberculosis.
7 3 noun n noun
• a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
Example sentence • Scandium and yttrium are often grouped together in the periodic table due to their similar properties.
6 3 noun n noun
• large genus of perennial and biennial pungent bulbous plants: garlic; leek; onion; chive; sometimes placed in family Alliaceae as the type genus
Example sentence • The allium has a pungent aroma that is released when it is cut or crushed.
9 4 noun n noun
• (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
Example sentence • A single bacterium can multiply into millions within a few hours.
11 5 noun n noun
• a radioactive transuranic element; discovered by bombarding curium with alpha particles
Example sentence • Scientists at the Lawrence Berkeley National Laboratory in California were involved in the discovery of californium .
6 3 noun n noun
• a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
Example sentence • The atomic symbol for cesium is Cs.
11 4 noun n noun
• spindle-shaped bacterial cell especially one swollen at the center by an endospore
11 4 noun n noun
• a radioactive transuranic element produced by bombarding plutonium with neutrons
Example sentence • The use of einsteinium in practical applications is limited due to its rarity and radioactivity.
6 3 noun, adjective n, adj noun
• a trivalent metallic element of the rare earth group; occurs with yttrium
Example sentence • The erbium ion emits a pink light when excited.
8 3 noun n noun
• a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Example sentence • The discovery of francium 's existence was a significant scientific achievement.
8 4 noun n noun
• any of numerous plants of the family Geraniaceae
Example sentence • I planted a beautiful geranium in my garden.
8 4 noun n noun
• the domain ruled by an emperor or empress; the region over which imperial dominion is exercised
Example sentence • The emperor held absolute imperium over the Roman Empire.
10 4 noun n noun
• a radioactive transuranic element synthesized from californium
Example sentence • The atomic number of lawrencium is 103.
10 5 noun n noun
• a legally authorized postponement before some obligation must be discharged
Example sentence • The government announced a moratorium on gas exploration in environmentally sensitive areas.
8 4 noun n noun
• a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
Example sentence • Marie Curie discovered polonium in 1898.
8 4 noun n noun
• a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
Example sentence • The rubidium atom has 37 electrons and 37 protons.
9 4 noun n noun
• a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold
Example sentence • The melting point of tellurium is approximately 449.5 degrees Celsius.
7 3 verb, noun v, n noun
• a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
Example sentence • The terbium atom has a radius of approximately 181 pm.
9 4 noun n noun
• a vivarium in which selected living plants are kept and observed
Example sentence • I have a small terrarium with succulents on my desk.
11 5 noun n noun
• The membrane (or periosteum) which covers the outer surface of the skull.
12 6 noun n noun
• a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
Example sentence • The main application of praseodymium is in magnets.
6 3 noun n noun
• fruiting body of some rust fungi bearing chains of aeciospores
Example sentence • The aecium is a reproductive structure in certain rust fungi.
11 5 noun n noun
• the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers
Example sentence • The antheridium is the male reproductive structure in mosses and ferns.
10 5 noun n noun
• a cuplike ascocarp in many lichens and ascomycetous fungi
Example sentence • The apothecium is the fruiting body of a certain group of fungi.
11 5 noun n noun
• a female sex organ occurring in mosses, ferns, and most gymnosperms
Example sentence • The archegonium is a multicellular, flask-shaped structure found in the reproductive organs of some plants.
7 3 noun n noun
• a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
Example sentence • The atomic number of caesium is 55.
11 5 noun n noun
• genus of chiefly American perennial leafy-stemmed orchids: lady's slippers; sometimes includes species of genus Paphiopedilum
9 5 noun n noun
• the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes
Example sentence • The diazonium ion is formed by the reaction of an aromatic amine with nitrous acid.
7 3 noun n noun
• a transuranic element with atomic number 105
Example sentence • The discovery of dubnium was confirmed in 1970.
10 5 noun n noun
• the muscle and aponeurosis and skin covering the cranium
Example sentence • The epicranium is the scalp of the head.
8 4 noun n noun
• (rhetoric) the introductory section of an oration or discourse
Example sentence • The professor began his lecture with a lengthy exordium about the importance of studying history.
9 4 noun n noun
• evergreen twining shrubs of Americas and southeastern Asia
10 4 noun n noun
• a barbed spine or bristle (often tufted on cacti)
Example sentence • The glochidium is a larval stage of freshwater mussels.
7 3 noun
• a transuranic element with atomic number 105
Example sentence • The element hahnium was named after the German physicist Otto Hahn.
7 3 noun n noun
• a radioactive transuranic element, with atomic number 108
Example sentence • The discovery of hassium was first reported in 1984 by a German research team.
10 4 noun n noun
• a root-like attachment in parasitic plants that penetrates and obtains food from the host
Example sentence • The haustorium of a parasitic plant penetrates the host plant to obtain nutrients.
8 4 noun n noun
• spore-bearing layer of cells in certain fungi containing asci or basidia
Example sentence • The hymenium of the mushroom is where the spores are produced.
10 4 noun n noun
• the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae)
Example sentence • The hypanthium of the rose is cup-shaped and contains the base of the petals and sepals.
10 4 noun n noun
• a radioactive transuranic element, with atomic number 109
Example sentence • The discovery of meitnerium was first reported in 1982 by a German research team.
8 4 noun n noun
• the vegetative part of a fungus consisting of a mass of branching threadlike hyphae
Example sentence • The mycelium of a mushroom is found underground or in decaying matter.
7 4 noun, adjective n, adj noun
• a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
Example sentence • The niobium wire has excellent mechanical properties.
10 5 noun n noun
• a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
Example sentence • The metal osmiridium is often found in association with platinum.
11 5 noun n noun
• genus of fungi commonly growing as green or blue molds on decaying food; used in making cheese and as a source of penicillin
Example sentence • Some species of penicillium are used to produce the antibiotic penicillin.
10 4 noun n noun
• a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session
Example sentence • The praesidium was responsible for maintaining security in the city.
10 4 noun n noun
• the third compartment of the stomach of a ruminant
Example sentence • The medieval psalterium was beautifully illuminated with gold leaf.
9 4 noun n noun
• either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula
Example sentence • He went to the doctor to have his pterygium examined.
9 4 noun n noun
• flask-shaped asexual structure containing conidia
Example sentence • The pycnidium releases spores to infect nearby plants.
12 4 noun n Example sentence • The quinquennium of the mayor's term is coming to an end.
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