linearly ordered set
linearly ordered set[′lin·ē·ər·lē ¦ȯr·dərd ′set]
A set with an ordering ≤ such that for any two elements a and b either a ≤ b or b ≤ a. Also known as chain; completely ordered set; serially ordered set; simply ordered set; totally ordered set.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.