speculum alloy

speculum alloy

[′spek·yə·ləm ′al‚ȯi]
(metallurgy)
A brilliant white, hard, brittle alloy composed of copper and tin in a 2:1 proportion and sometimes with additions of other elements.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.