Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
allopatry is a noun meaning "the occurrence of related organisms in separate geographical areas with no overlap". It carries one recorded sense.
the occurrence of related organisms in separate geographical areas with no overlap
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for allopatry come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.