Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
geological period | Yes | No | No | No |
Missippian period | Yes | No | No | No |
geological period (noun) | Missippian period (noun) |
---|---|
a unit of geological time during which a system of rocks formed | the period from 345 million to 310 million years ago; characterized by an increase of land areas, primitive ammonites and winged insects |