Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

1847, back-formation from allotropy "variation of physical properties without change of substance," from allo- + -tropy "manner" (see -trope). Related: Allotropic.

MORE RELATED WORDS FOR ALLOTROPE

diamond

noungemstone
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.