| 释义 |
demoid, a.|ˈdiːmɔɪd|
[ad. Gr. δηµοειδής vulgar, f. δῆµος the commons, the people: see -oid.]
Used of a type of animal or plant which by its commonness or abundance characterizes a geographical region or a period of time; especially of the characteristic fossil type of a geological formation.
1884H. G. Seeley Phillip's Man. of Geol. i. 437 The abundant demoid types, which are termed characteristic fossils, for their abundance is such that strata are easily recognised by them. Every formation has its demoid types; which in the Primary rocks are generally brachiopods. 1885W. H. Hudleston in Geol. Mag. 128 The relations of a thoroughly demoid type are pretty wide. |