词源 |
substratum n.1630s, from Modern Latin substratum (plural substrata), noun use of neuter singular past participle of Latin substernere "to spread underneath," from sub "under, below, beneath" (see sub-) + sternere "to spread out, lay down, stretch out," from nasalized form of PIE root *stere- "to spread." updated on April 24, 2017 |