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Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
pronucleus is a noun meaning "the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote". It carries one recorded sense.
the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote
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 pronucleus come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.