Pronunciation: (i-kwā'zhu-nl, -shu-), [key]
1. of, using, or involving equations.
2. Biol.pertaining to the second or nonreductional cell division in meiosis, in which each chromosome divides into two equal parts.
3. Gram.(of a sentence or predication) consisting of a subject and a complement with or without a copula: “Very interesting, those books” is an equational sentence.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.