[ek-soh-skel-i-tn] /ˌɛk soʊˈskɛl ɪ tn/
an external covering or integument, especially when hard, as the shells of crustaceans (opposed to ).
the protective or supporting structure covering the outside of the body of many animals, such as the thick cuticle of arthropods Compare endoskeleton
1847, from exo- + skeleton. Introduced by English anatomist Sir Richard Owen (1804-1892).
exoskeleton ex·o·skel·e·ton (ěk’sō-skěl’ĭ-tn)
A hard, protective outer body covering of an animal, such as an insect, crustacean, or mollusk. The exoskeletons of insects and crustaceans are largely made of chitin. Compare endoskeleton.
[ek-sos-moh-sis, ek-soz-] /ˌɛk sɒsˈmoʊ sɪs, ˌɛk sɒz-/ noun 1. Biology. osmosis toward the outside of a cell or vessel. 2. Physical Chemistry. the flow of a substance from an area of greater concentration to one of lower concentration (opposed to ). /ˌɛksɒzˈməʊsɪs; -sɒs-/ noun 1. (biology) osmosis in which water flows from a cell or […]
[ek-soh-sfeer] /ˈɛk soʊˌsfɪər/ noun 1. the highest region of the atmosphere, where the air density is so low that a fast-moving air molecule is more than 50 percent likely to escape from the atmosphere instead of hitting other molecules. /ˈɛksəʊˌsfɪə/ noun 1. the outermost layer of the earth’s atmosphere. It extends from about 400 km […]
[ek-suh-spawr, -spohr] /ˈɛk səˌspɔr, -ˌspoʊr/ noun, Botany, Mycology. 1. the outer coat of a . /ˈɛksəʊˌspɔː/ noun 1. the outer layer of the spores of some algae and fungi
[ek-soh-spawr-ee-uh m, -spohr-] /ˌɛk soʊˈspɔr i əm, -ˈspoʊr-/ noun, plural exosporia [ek-soh-spawr-ee-uh, -spohr-] /ˌɛk soʊˈspɔr i ə, -ˈspoʊr-/ (Show IPA) 1. .