yd.: Abbreviation for a yard as a measure of length. A yard equals 3 feet or 36 inches. The metric equivalents for these measures of length are: A yard = 0.9144 meter. A foot = 30.48 centimeters. An inch = 2.54 centimeters. Found on http://www.medterms.com/script/main/art.asp?articlekey=6050