Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'mercaptan'Ger, contr. < ML mercurium captans, lit., seizing mercury < L mercurius, mercury (see mercury, n.) + captans, prp. of captare, to seize, freq. of capere: see have