(metrology) An SI unit of time equal to 10⁻⁶ seconds. Symbol: μs It is commonly represented with symbol µs.

(microbiology) An organism that is too small to be seen by the unaided eye, especially a single-celled organism, such as a bacterium.

A Christian feast celebrated on the 29th of September in honour of the archangel Michael. / (UK, Ireland, law, education) Ellipsis of Michaelmas term.

(physics) The thousandth part of one millimeter; the millionth part of a meter. / (figuratively) A very tiny amount.

(linguistics) Synonym of breve

(mineralogy) Any of a group of hydrous aluminosilicate minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic.

The subdiscipline of soil science that studies the functions and activities of soil-based microorganisms.

The most famous Disney cartoon character, an anthropomorphic mouse with a falsetto voice and a cheerful disposition.

(idiomatic) Of inferior quality.

In the absence of a controlling entity, subordinates will take advantage of circumstances.