Apposition
Part of speech: noun
Definition: a construction in which one noun or noun phrase is placed with another as an explanatory equivalent, both having the same syntactic function in the sentence. The relationship between such nouns or noun phrases. The quality of being side-by-side, apposed instead of being opposed, not being front-to-front but next to each other. A placing of two things side by side, or the fitting together of two things. In biology, the growth of successive layers of a cell wall.
Collocation
Part of speech: noun
Definition: The grouping or juxtaposition of things, especially words or sounds.# Such a specific grouping.#* 1880, William Dwight Whitney, Richard Morris, Language and its study, with especial reference to the Indo-European family, 2nd ed, Trübner & Co., p 56:#*: We said at first breāk fâst—“I broke fast at such an hour this morning:” he, or they, who first ventured to say I breakfasted were guilty of as heinous a violation of grammatical rule as he would be who should now declare I takedinnered, instead of I took dinner; but good usage came over to their side and ratified the blunder, because the community were minded to give a specific name to their earliest meal and to the act of partaking of it, and therefore converted the collocation breākfâst into the real compound brĕakfast.The statistically significant collocation of particular words in a language.A method of determining coefficients in an expansion y(x) = y_{0}(x) + \sum_{l=0}^{q}\alpha_{l} y_{l}(x) so as to nullify the values of an ordinary differential equation L[y(x)]=0 at prescribed points.