sulph-


Also found in: Medical.

sulph-

or

sulf-

combining form
(Chemistry) containing sulphur: sulphate; sulphonic acid.
Usage: The 'ph' spelling of sulphur and related words is used in British English. In the US the spelling is sulfur. However, the recommended spelling in chemistry is sulfur and this is found in technical writing. Also the sulf- spelling is used in the names of generic drugs
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

sulph-


Chiefly Brit.
var. of sulf-.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.