tertiary

Of third rank or order; subsequent.

An untaught peasant beheld the elements around him and was acquainted with their practical uses. The most learned philosopher knew little more. He had partially unveiled the face of Nature, but her immortal lineaments were still a wonder an

Possessing some quality in the third degree; especially having been subjected to the substitution of three atoms or radicals.

a tertiary alcohol, amine, or salt

Of quills: growing on the innermost joint of a bird's wing; tertial.

Any item considered to be of third order.

A tertiary colour.

Something from the Tertiary Period (the former term for the geologic period from 65 million to 2.58 million years ago).

A tertiary feather; a tertial.

A large stage in some extremely powerful thermonuclear weapons (resembling a greatly-enlarged secondary) which is compressed by the explosion of the secondary until ignition of nuclear fusion takes place, in much the same manner as the secondary is imploded by the primary, and which can allow for the attainment of yields of many tens or even hundreds of megatons, and likely even greater; not used

A gigaton-scale weapon would of necessity be a three-stage design (incorporating a fusion tertiary - likely with its own massive fission tamper - in addition to the fission primary and fission-jacketed fusion secondary), as a reasonably-siz

A member of a Roman Catholic third order; a layperson who participates in activities similar to those engaged in by men and women who take religious vows (respectively the first and second orders), and who may wear some elements of an order's habit such as a scapular.

Immediately after her arrival in Ferrara, while she was still striving to secure the foundation of her exemplary reformed community of Dominican tertiaries, [Lucia] Brocadelli also renewed her attempts to enhance [Girolamo] Savonarola's sai

Of or pertaining to the first part of the Cenozoic era when modern flora and mammals appeared.