8 3 noun n noun
• a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
Example sentence • Water is composed of two hydrogen atoms and one oxygen atom.
8 3 noun, adjective n, adj noun
• any disease-producing agent (especially a virus or bacterium or other microorganism)
Example sentence • The pathogen responsible for the outbreak has been identified as a strain of flu virus.
8 3 noun n noun
• one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body
Example sentence • Athletes often consume high-carbohydrate diets to maximize their glycogen stores.
7 3 noun, adjective n, adj noun
• any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Example sentence • Iodine is a halogen that is commonly used as an antiseptic.
9 3 noun n noun
• a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
Example sentence • During pregnancy, oestrogen levels increase significantly.
12 5 noun, adjective n, adj noun
• a psychoactive drug that induces hallucinations or altered sensory experiences
Example sentence • LSD is a well-known hallucinogen .
7 3 noun n noun
• any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem
Example sentence • Ferns are the most common type of acrogen .
9 3 noun n noun
• a compound that can be converted to a pigment
Example sentence • A chromogen is a substance that can be converted into a colored compound.
6 3 noun
• flowering plant with two cotyledons; the stem grows by deposit on its outside
9 3 noun n noun
• any substance (such as thiouracil) that induces the formation of a goiter
Example sentence • Certain vegetables like kale and broccoli contain goitrogens.
9 4 noun n noun
• any substance or organism that provokes an immune response (produces immunity) when introduced into the body
Example sentence • Scientists are studying the potential of using the new immunogen as a vaccine against the flu virus.
7 3 noun n noun
• an agent that triggers mitosis
Example sentence • The scientist used mitogens to stimulate cell division in the experiment.
11 4 noun, adjective n, adj noun
• any of a group of steroid hormones that have the effect of progesterone
Example sentence • The progestogen in the pill helps prevent pregnancy.
7 3 noun n noun
• any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
Example sentence • The zymogen is stored in the inactive form until it is needed for digestion.
8 4 noun n
No meanings yet for this word...
Example sentence • The formation of amidogen can be observed in certain chemical reactions.
8 3 noun n
No meanings yet for this word...
Example sentence • The study of histogens is fundamental in understanding tissue formation.
9 3 noun n noun
• Any substance that governs the movement and development of cells during morphogenesis by forming a concentration gradient in the developing tissue.
Example sentence • Scientists are studying the role of morphogens in tissue regeneration.
7 3 noun n noun
• any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation
Example sentence • Exposure to certain chemicals may result in the production of mutagens.
11 5 noun n
No meanings yet for this word...
Example sentence • The oxyhydrogen flame is often used in metal cutting and welding processes.
13 5 noun n
No meanings yet for this word...
Example sentence • The phytopathogen caused significant damage to the farmer's crops.
7 2 verb, noun v, n noun
• A swimming stroke in which the left and right hands are alternately raised out of the water, brought forward and drawn back through the water. A scissor kick is performed on every second stroke.
Example sentence • The trudgen is a swimming stroke named after its innovator, English swimmer John Trudgen .
13 5 noun n
No meanings yet for this word...
Example sentence • The structure of tropocollagen consists of three polypeptide chains.
12 6 noun n noun
• a chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine
Example sentence • High levels of urobilinogen in the urine may indicate liver disease.
9 4 noun n
No meanings yet for this word...
Example sentence • Rhodiola is an adaptogen that helps the body deal with stress.
12 5 noun n
No meanings yet for this word...
Example sentence • Scientists at CERN were able to confine antihydrogen in a magnetic trap.
10 4 noun n
No meanings yet for this word...
Example sentence • The chemical formula for dinitrogen is N2.
13 6 noun n
No meanings yet for this word...
Example sentence • The ferrocyanogen compound can be used as a food additive in some countries.
12 5 noun n
No meanings yet for this word...
Example sentence • Water is composed of monohydrogen and dihydrogen.
6 3 noun n
No meanings yet for this word...
Example sentence • The Himalayas are an example of a major orogen .
13 5 noun, adjective n, adj
No meanings yet for this word...
Example sentence • The orthohydrogen form of hydrogen has a higher energy than the para-hydrogen form.
12 5 noun n
No meanings yet for this word...
Example sentence • The production of parahydrogen relies on the conversion of orthohydrogen.
8 3 noun n
No meanings yet for this word...
13 4 noun n
No meanings yet for this word...
Example sentence • Some studies suggest that phytoestrogens may reduce the risk of certain hormone-related cancers.
3 1 noun n noun
• the force of workers available
Example sentence • There were many men at the construction site.
4 1 adverb adv adverb
• subsequently or soon afterward (often used as sentence connectors)
adjective satellite
• at a specific prior time
Example sentence • I will study for the exam and then go to bed.
4 1 adverb adv noun
• The time at which something happens.
adverb
• (interrogative) At what time? At which time? Upon which occasion or circumstance? Used to introduce direct or indirect questions about time.
pronoun
• (interrogative) What time; which time.
conjunction
• At (or as soon as) that time that; at the (or any and every) time that; if.
interjection
• That's enough, a command to stop adding something, especially an ingredient of food or drink.
Example sentence • I always get hungry when I see a pizza commercial.
11 5 noun n
No meanings yet for this word...
Example sentence • An antimutagen is a substance that helps to prevent or reduce the frequency of mutations in cells.
5 2 adverb, adjective adv, adj noun
• an assumption that is taken for granted
adjective satellite
• acknowledged as a supposition
Example sentence • Her given name is Elizabeth, but she goes by Liz.
5 2 noun n noun
• the cardinal number that is the sum of six and one
adjective satellite
• being one more than six
Example sentence • He won the jackpot with the lucky number seven .
6 2 adverb, adjective adv, adj adjective
• happening without warning or in a short space of time
Example sentence • I was startled by the sudden noise.
3 1 noun n noun
• the cardinal number that is the sum of nine and one; the base of the decimal system
adjective satellite
• being one more than nine
Example sentence • There are ten apples on the table.
8 3 verb v noun
• any chemical element that belongs to the carbon group.
5 2 adverb adv Example sentence • I am so excited to see her again .
4 2 adverb adv noun
• the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
adverb
• used as an intensive especially to indicate something unexpected
adjective satellite
• equal in degree or extent or amount; or equally matched or balanced
Example sentence • I can't believe she stayed calm even in such a difficult situation.
5 2 noun n noun
• a shelter serving as a place of safety or sanctuary
Example sentence • The house by the lake became their tranquil haven .
6 2 verb v Example sentence • Please listen carefully to my instructions.
4 2 verb, adjective v, adj adjective
• affording unobstructed entrance and exit; not shut or closed
noun
• a clear or unobstructed space or expanse of land or water
adjective satellite
• with no protection or shield
verb
• cause to open or to become open
8 3 noun n noun
• a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
Example sentence • The Earth's atmosphere is composed mostly of nitrogen .
10 4 noun, adjective n, adj
No meanings yet for this word...
Example sentence • Many people take adaptogens as part of their daily supplement routine.
4 2 noun n noun
• a primeval Egyptian personification of air and breath; worshipped especially at Thebes
Example sentence • The congregation replied 'amen ' after the priest finished his prayer.
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