Septenary vs. Tertiary

Septenaryadjective

Consisting of or containing seven.

Tertiaryadjective

Of third rank or order; subsequent.

Septenaryadjective

Of seventh rank or order.

Tertiaryadjective

(chemistry) 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’;

Septenaryadjective

Lasting seven years; continuing seven years.

Tertiaryadjective

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

Septenarynoun

A group of seven things.

Tertiarynoun

Any item considered to be of third order.

Septenarynoun

A period of seven years.

Tertiarynoun

A tertiary colour.

Septenarynoun

(music) The seven notes of the diatonic scale.

Tertiarynoun

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

Septenaryadjective

Consisting of, or relating to, seven; as, a septenary number.

Tertiarynoun

(ornithology) A tertiary feather; a tertial.

Septenaryadjective

Lasting seven years; continuing seven years.

Tertiarynoun

(Roman Catholicism) 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.

Septenarynoun

The number seven.

Tertiaryadjective

Being of the third formation, order, or rank; third; as, a tertiary use of a word.

Tertiaryadjective

Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary.

Tertiaryadjective

Later than, or subsequent to, the Secondary.

Tertiaryadjective

Growing on the innermost joint of a bird's wing; tertial; - said of quills.

Tertiarynoun

A member of the Third Order in any monastic system; as, the Franciscan tertiaries; the Dominican tertiaries; the Carmelite tertiaries. See Third Order, under Third.

Tertiarynoun

The Tertiary era, period, or formation.

Tertiarynoun

One of the quill feathers which are borne upon the basal joint of the wing of a bird. See Illust. of Bird.

Tertiarynoun

from 63 million to 2 million years ago

Tertiaryadjective

coming next after the second and just before the fourth in position

Tertiary

Tertiary ( TUR-shə-ree, TUR-shee-err-ee) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start of the Cenozoic Era, and extended to the beginning of the Quaternary glaciation at the end of the Pliocene Epoch.