Surd, n.(Math.) 1. A quantity which can not be expressed by rational numbers; thus, √2 is a surd.
2. (Phon.) A surd element of speech. See Surd, a., 4.
Webster's Dictionary 1913
Surd, n.(Math.) 1. A quantity which can not be expressed by rational numbers; thus, √2 is a surd.
2. (Phon.) A surd element of speech. See Surd, a., 4.