- a combining form meaning “other,” used in the formation of compound words (allotrope) and in chemistry to denote the more stable of two geometric isomers.
combining form
- indicating difference, variation, or oppositionallopathy; allomorph; allophone; allonym
word-forming element meaning “other,” from Greek allo-, comb. form of allos “other, different” (see alias (adv.)).
pref.
- Other; different:allotransplantation.
- Isomeric:allomorphism.