Dictionary
surd
Pronunciation: (sûrd), [key]—
adj.
1. Phonet.voiceless (opposed to
sonant).
2. Math.(of a quantity) not capable of being expressed in rational numbers; irrational.
—
n.
1. Phonet.a voiceless consonant (opposed to
sonant).
2. Math.a surd quantity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.