- of the third order, rank, stage, formation, etc.; third.
- Chemistry.
- noting or containing a carbon atom united to three other carbon atoms.
- formed by replacement of three atoms or groups.
- noting or pertaining to the period forming the earlier part of the Cenozoic Era, occurring from 65 million to 2 million years ago, characterized by the development and proliferation of mammals.
- tertial.
- noting or pertaining to a branch, or third order, of certain religious orders that consists of lay members living in community (regular tertiaries ) or living in the world (secular tertiaries ).
- the Tertiary Period or System.
- a tertial feather.
- a member of a tertiary branch of a religious order.
- tertiary color.
- third in degree, order, etc
- (of education) taking place after secondary school, such as at university, college, etc
- (of an industry) involving services as opposed to extraction or manufacture, such as transport, finance, etc
- of or relating to a Third Order
- chem
- (of an organic compound) having a functional group attached to a carbon atom that is attached to three other groups
- (of an amine) having three organic groups attached to a nitrogen atom
- (of a salt) derived from a tribasic acid by replacement of all its acidic hydrogen atoms with metal atoms or electropositive groups
- of, relating to, or designating any of the small flight feathers attached to the part of the humerus nearest to the body
- any of the tertiary feathers
- a member of a Third Order
- of, denoting, or formed in the first period of the Cenozoic era, which lasted for 63 million years, during which mammals became dominant
- the Tertiary period or rock system, divided into Palaeocene, Eocene, Oligocene, Miocene, and Pliocene epochs or series
