| 单词 | substratum |
| 释义 | substratum —substrative, substratal, adj. /sub"stray'teuhm, -strat'euhm, sub stray"teuhm, -strat"euhm/, n. , pl. substrata /-stray'teuh, -strat'euh, -stray"teuh, -strat"euh/, substratums. 1. something that is spread or laid under something else; a stratum or layer lying under another. 2. something that underlies or serves as a basis or foundation. 3. Agric. the subsoil. 4. Biol. the base or material on which a nonmotile organism lives or grows. 5. Philos. substance, considered as that which supports accidents or attributes. 6. Photog. a layer of material placed directly on a film or plate as a foundation for the sensitive emulsion. 7. Historical Ling. a set of features of a language traceable to the influence of an earlier language that it has replaced, esp. among a subjugated population: The French word for 80, quatre-vingts ("four twenties"), may reflect a Celtic substratum. Cf. superstratum. [1625-35; < NL; see SUB-, STRATUM] |
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