compression (noun)
1compression — ► NOUN 1) the action of compressing or being compressed. 2) the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition. DERIVATIVES compressional adjective …
2compression chamber — UK US noun [countable] [singular compression chamber plural compression chambers] physics the part of a jet engine where air is put under extra pressure before it is sent into the …
3compression ratio — noun a) The ratio of the volume between the cylinder head of an internal combustion engine and the piston before and after the compression stroke b) The ratio of the size of compressed data after the execution of some compression algorithm to the …
4compression — noun Compression is used before these nouns: ↑bandage Compression is used after these nouns: ↑image …
5compression — c.1400, from M.Fr. compression (14c.), from L. compressionem (nom. compressio) a pressing together, noun of action from compress , pp. stem of comprimere (see COMPRESS (Cf. compress)). Related: Compressional wave (1887) …
6compression ignition — noun : ignition in an internal combustion engine in which the necessary high temperature is produced by compressing air in the cylinder before admission of the fuel (as in a diesel engine) compression ignition engine * * * compression ignition,… …
7compression wave — noun see compressional wave * * * a shock wave that compresses the medium through which it is transmitted. Also, compressional wave. Cf. expansion wave. [1885 90] * * * compression wave, Physics. a wave in which the particles of a substance move… …
8compression-ignition engine — noun An internal combustion engine in which ignition of the liquid fuel injected into the cylinder is performed by the heat of compression of the air charge • • • Main Entry: ↑compress …
9compression wave — noun Any wave that is propagated by the compression of a fluid; examples include sound Syn: longitudinal wave …
10compression fracture — noun Any fracture of a bone (most often a load bearing bone such as a vertebra) caused by compression …
