Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for tertiary from the 1913 edition of Webster's Revised Unabridged Dictionary. Define tertiary using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: Noun
Results: 7
1. Being of the third formation, order, or rank; third; as, a tertiary use of a word.
2. 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.
3. Later than, or subsequent to, the Secondary.
4. Growing on the innermost joint of a bird's wing; tertial; - said of quills.
Part of Speech: noun
2. One of the quill feathers which are borne upon the basal joint of the wing of a bird. See Illust. of Bird.
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