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.
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.
6 3 noun n noun
• a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
Example sentence • Plants release oxygen as a byproduct of photosynthesis.
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 .
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.
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 .
10 4 noun n noun
• any substance that produces cancer
Example sentence • Smoking is a well-known carcinogen .
8 3 noun, adjective n, adj noun
• a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
Example sentence • High levels of estrogen during pregnancy contribute to the growth of the fetus.
6 3 noun n noun
• the place where something begins, where it springs into being
Example sentence • The origin of the universe is still a topic of debate among scientists.
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 .
7 3 noun n noun
• any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies)
Example sentence • The vaccine works by introducing a weakened form of the antigen to stimulate the immune system.
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.
7 3 noun n noun
• an agent that triggers mitosis
Example sentence • The scientist used mitogens to stimulate cell division in the experiment.
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 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.
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
• 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 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.
8 4 noun n
No meanings yet for this word...
Example sentence • The formation of amidogen can be observed in certain chemical reactions.
11 5 noun n
No meanings yet for this word...
Example sentence • The oxyhydrogen flame is often used in metal cutting and welding processes.
7 2 verb, noun v, n noun
• an officer holding a rank below a major but above a lieutenant
verb
• be the captain of a sports team
Example sentence • The captain of the soccer team is injured.
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.
13 5 noun n
No meanings yet for this word...
Example sentence • The structure of tropocollagen consists of three polypeptide chains.
3 1 verb v noun
• airtight sealed metal container for food or drink or paint etc.
verb
• preserve in a can or tin
Example sentence • She can play the piano beautifully.
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 verb, noun v, n noun
• someone who has won first place in a competition
adjective satellite
• holding first place in a contest
verb
• protect or fight for as a champion
Example sentence • He trained hard to become the champion of his weight class.
7 2 verb, noun v, n noun
• an organization of missionaries in a foreign land sent to carry on religious work
Example sentence • The astronauts were on a dangerous mission to explore the uncharted territory of outer space.
7 3 noun, adjective n, adj noun
• a native or naturalized member of a state or other political community
Example sentence • She is a responsible citizen who always volunteers in community projects.
5 2 noun, adjective n, adj noun
• a person who comes from a foreign country; someone who does not owe allegiance to your country
adjective satellite
• not contained in or deriving from the essential nature of something
verb
• transfer property or ownership
Example sentence • The alien from another planet had blue skin.
5 2 noun n noun
• a nobleman (in various countries) of varying rank
Example sentence • The baron was known for his extravagant parties and lavish lifestyle.
6 2 verb, noun v, n noun
• a fire (usually on a hill or tower) that can be seen from a distance
Example sentence • The lighthouse acts as a beacon for ships at sea.
7 2 noun n noun
• the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen
adjective satellite
• denoting a quantity consisting of one thousand million items or units in the United States
Example sentence • She inherited billions of dollars from her grandfather.
6 2 noun n noun
• a ravine formed by a river in an area with little rainfall
Example sentence • We hiked through the narrow canyon , surrounded by towering cliffs.
7 2 noun n noun
• the trait of being cautious; being attentive to possible danger
verb
• warn strongly; put on guard
Example sentence • He approached the edge of the cliff with caution .
5 2 noun n noun
• an adult female person (as opposed to a man)
Example sentence • She is a strong and independent woman .
6 2 verb, adjective v, adj Example sentence • He found a hidden treasure in the old trunk.
5 2 adjective adj adjective satellite
• filled with a great quantity
verb
• remove with or as if with a ladle
Example sentence • The tree branches were laden with ripe fruits.
6 2 noun n noun
• an unmarried girl (especially a virgin)
adjective satellite
• serving to set in motion
Example sentence • The maiden took a deep breath before stepping onto the stage.
6 2 verb, adjective v, adj adjective satellite
• disturbed psychologically as if by a physical jolt or shock
Example sentence • She was visibly shaken after the car accident.
5 2 noun n noun
• a woman who is considered to be dangerously seductive
Example sentence • The sound of the siren warned us of the approaching tornado.
8 3 verb v verb
• stop blaming or grant forgiveness
Example sentence • I have forgiven him for his mistakes.
13 3 noun n noun
• a child of your son or daughter
Example sentence • I love spending time with my grandchildren .
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