individual animal, plant, piece of mineral. Items used for testing (urine, etc.).

piece of rock or metal that has fallen to earth's surface from outer space as meteor. Stony or metallic masses of matter that has fallen to the earth's surface from outer space.

small part or quantity intended to show what whole is like. Small quantities of something used as a taster. take sample or samples of something for analysis.

soft leather slipper or shoe, strictly one without separate heel. Soft leather shoe.

relating to or characteristic of microorganism.

used for emphasis with following adjective functioning as adverb. Thing that is not yet known or named.

having paid employment. action of doing work. To make an effort to do something.

Thing, person which represents a category. be illustrated or exemplified.

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.

contained as part of whole being considered. To make someone, something part of a group.

Person studying at school.

unit of information equal to one million million (10 ¹²) or, strictly, 2 ⁴⁰ bytes. Unit of 1024 gigabytes of information.

To act or speak for another person or other people.

large bony marine fish with three-lobed tail fin. .

Concerning a Masters or Ph.D. university courses. Someone who has a degree from a school, university. To move up from a position to a higher, better one.