| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024sub•stra•tum /ˈsʌbˌstreɪtəm, -ˌstrætəm, sʌbˈstreɪtəm, -ˈstrætəm/USA pronunciation n. [countable], pl. -stra•ta /-ˌstreɪtə, -ˌstrætə, -ˈstreɪtə, -ˈstrætə/USA pronunciation -stra•tums. - something spread or laid under something else.
- something that is under something else or serves as a foundation.
See -strat-. WordReference Random House Unabridged Dictionary of American English © 2024sub•stra•tum (sub′strā′təm, -strat′əm, sub strā′təm, -strat′əm),USA pronunciation n., pl. -stra•ta (-strā′tə, -strat′ə, -strā′tə, -strat′ə),USA pronunciation - stra•tums. - something that is spread or laid under something else;
a stratum or layer lying under another. - something that underlies or serves as a basis or foundation.
- [Agric.]the subsoil.
- Ecology, Laboratory[Biol.]the base or material on which a nonmotile organism lives or grows.
- Philosophysubstance, considered as that which supports accidents or attributes.
- Photographya layer of material placed directly on a film or plate as a foundation for the sensitive emulsion.
- Linguistics[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.
- Neo-Latin; see sub-, stratum
- 1625–35
Collins Concise English Dictionary © HarperCollins Publishers:: substratum /sʌbˈstrɑːtəm -ˈstreɪ-/ n ( pl -strata / -ˈstrɑːtə -ˈstreɪtə/)- any layer or stratum lying underneath another
- a basis or foundation; groundwork
Etymology: 17th Century: from New Latin, from Latin substrātus strewn beneath, from substernere to spread under, from sub- + sternere to spreadsubˈstrative, subˈstratal adj |