guide fossil

guide fossil

noun

Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
guide fossil

noun
a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found [syn: index fossil
WordNet® 3.0, © 2006 by Princeton University.
Cite This Source
00:10
Guide fossil is always a great word to know.
So is ninnyhammer. Does it mean:
a chattering or flighty, light-headed person.
a fool or simpleton; ninny.
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