a single thing or person.

any group of things or persons regarded as an entity

They formed a cohesive unit.

one of the individuals or groups that together constitute a whole; one of the parts or elements into which a whole may be divided or analyzed.

one of a number of things, organizations, etc., identical or equivalent in function or form

a rental unit; a unit of rolling stock.

any magnitude regarded as an independent whole; a single, indivisible entity.

Also called dimension. any specified amount of a quantity, as of length, volume, force, momentum, or time, by comparison with which any other quantity of the same kind is measured or estimated.

the least positive integer; one.

Also called unit's place.

(in a mixed number) the position of the first digit to the left of the decimal point.

(in a whole number) the position of the first digit from the right of the decimal point.

a machine, part, or system of machines having a specified purpose; apparatus

a heating unit.

Education . a division of instruction centering on a single theme.

Military . an organized body of soldiers, varying in size and constituting a subdivision of a larger body.

Medicine/Medical .

the measured amount of a substance necessary to cause a certain effect; a clinical quantity used when a substance cannot be readily isolated in pure form and its activity determined directly.

the amount necessary to cause a specific effect upon a specific animal or upon animal tissues.

Mathematics .

an identity element.

an element in a group, ring, etc., that possesses an inverse.

noun

part , piece , whole

noun

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