GMAT RC chems&medc – 75 Words

thyroid

located near the base of the neck

tranquilizer

a drug used to reduce stress or tension without reducing mental clarity

tuberculosis

infection transmitted by inhalation or ingestion of bacilli

typhoid

infection marked by intestinal inflammation and ulceration

ulcer

an inflammatory lesion resulting in decay of tissue

vaccinate

produce immunity in by inoculation

vaccine

injection of weakened or dead microbes to create antibodies

varicose

abnormally swollen or knotty

vascular

relating to vessels that conduct and circulate fluids

venous

of or contained in or performing the function of the veins

vitamin

an organic substance essential to normal metabolism

viral

relating to or caused by a virus

virulent

extremely poisonous or injurious; producing venom

virus

infectious agent that replicates itself within living hosts

womb

a hollow muscular organ in which a developing fetus grows

yellow fever

caused by a flavivirus transmitted by a mosquito

aluminium

a silvery ductile metallic element found primarily in bauxite

amalgam

a combination or blend of diverse things

arsenic

a very poisonous metallic element

brazen

unrestrained by convention or propriety

bronze

an alloy of copper and tin and sometimes other elements

buffer

protect from impact

caffeine

a stimulant found in coffee and tea

calcium

a white metallic element that burns with a brilliant light

carbohydrate

an essential component of living cells and source of energy

carbon

an abundant nonmetallic element in all organic compounds

carotene

yellow or orange-red fat-soluble pigments in plants

catalyst

substance that initiates or accelerates a chemical reaction

chemical

produced by reactions involving atomic or molecular changes

cholesterol

a substance in the blood that can cause heart disease

cocaine

a narcotic extracted from coca leaves

cocoa

powder of ground roasted cacao beans with most of the fat removed

compound

a whole formed by a union of two or more elements or parts

dioxide

an oxide containing two atoms of oxygen in the molecule

ethylene

a flammable colorless gaseous alkene

formaldehyde

a colorless poisonous gas; made by the oxidation of methanol

glycerol

a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils

graphite

used as a lubricant and as a moderator in nuclear reactors

helium

a light colorless element that is one of the six inert gases

hemoglobin

a hemoprotein that gives red blood cells their color

herpes virus

any of the animal viruses that cause painful blisters on the skin

hydrocarbon

an organic compound containing only carbon and hydrogen

hydrogen

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

insecticide

a chemical used to kill bugs

metabolize

produce by the organic processes necessary for life

methane

a colorless odorless gas used as a fuel

mineral

a solid inorganic substance occurring in nature

molecule

the simplest structural unit of an element or compound

nitrogen

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

nucleotide

a phosphoric ester of a nucleoside

ocher

any of various earths containing silica and alumina and ferric oxide; used as a pigment

oligosaccharide

any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis

ore

a mineral that contains metal valuable enough to be mined

oxide

any compound of oxygen with another element or a radical

ozone

a colorless gas that is a screen for ultraviolet radiation

particulate

composed of distinct particles

pesticide

a chemical used to kill destructive insects or animals

petroleum

a dark oil consisting mainly of hydrocarbons

phosphate

a salt of phosphoric acid

pigment

dry coloring material

plutonium

a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239

pollutant

waste matter that contaminates the water, air, or soil

polymorph

an organism that can assume more than one adult form as in the castes of ants or termites

potassium

a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite

precipitation

the falling to earth of any form of water

preservative

tending or having the power to protect or prevent decay

protein

an organic compound essential to living cells

radon

a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health

ribosome

a particle in a cell that helps synthesize proteins

sodium

a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)

sulfur

an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)

uranium

a heavy toxic silvery-white radioactive metallic element

cinder

a fragment of incombustible matter left after a fire

char

burn to charcoal

crystallize

cause to form crystals or assume crystalline form
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