(a) any of various physical or monetary units agreed upon internationally; spec. (in later use) one forming part of the International System; cf…

A millionth part of a unit of measurement; spec. one millionth of an international unit (as of insulin or other hormone).

A unit of the relative distance on a chromosome between two linked genes, defined such that the distance in morgans between two genes is equal to…

A unit which is a million times larger than a basic unit of measurement; (Biology and Medicine) a million international units.

Abbreviations. In Biology S n. also S, s = Svedberg unit: used after a number to denote the (often characteristic) sedimentation coefficient of a…

Also Svedberg unit. A unit of time equal to 10—13 second used in expressing sedimentation coefficients. Symbol S (S, n.1 4b).

Physiology. Originally: a small voltage of which integral multiples go to make up the end-plate potential measured at a neuromuscular junction…

A unit in terms of which the effectiveness of a solution at catalysing the hydrolysis of starch can be stated (see quot. 1948).

A section of nucleic acid that codes for a specific polypeptide.