SILURIAN PERIOD

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

From 425 million to 405 million years ago; first air-breathing animals

Synonyms:

Silurian; Silurian period

Classified under:

Nouns denoting time and temporal relations

Instance hypernyms:

geological period; period (a unit of geological time during which a system of rocks formed)

Holonyms ("Silurian period" is a part of...):

Paleozoic; Paleozoic era (from 544 million to about 230 million years ago)

Credits