| a combining form meaning “different,” “other,” used in the formation of compound words: heterocyclic. |

| hetero- or heter- pref.
[Greek, from heteros, other; see sem-1 in Indo-European roots.] |
hetero- or heter-
pref.
Other; different: heterocellular.
| hetero-
A prefix that means "different" or "other," as in heterophyllous, having different kinds of leaves. |