Tertiary
WordNet
adjective
(1) Coming next after the second and just before the fourth in position
noun
(2) From 63 million to 2 million years ago
WiktionaryText
See also
- cubic
- primary (1)
- secondary (2)
- quaternary (4)
- nonary (9)
- denary (10)
- duodenary (12)
- vigenary (20)
Noun
- A tertiary feather.
- A member of a Roman Catholic third order - the Franciscans, Dominicans and Carmelites among others.