acerebral.
Without a brain.
Meaning & usage
Without a brain.
an acerebral organism
Not using or involving the brain.
He acted on reflex, an acerebral reaction to a situation beyond his control.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ἀ- (a-)der. English a- English cerebral English acerebral From a- + cerebral. Piecewise doublet of uncerebral.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.