Plural form referring to headless creatures or organisms; in biology, animals or larval forms lacking a distinct head.
From Greek a- (without) and kephale (head). Used in scientific Latin since the 17th century to classify organisms, particularly mollusks and other invertebrates.
Sea squirts and some mollusks are technically acephala—they have no brain or head region, challenging our basic animal classifications and reminding us that 'headless' doesn't mean helpless!
Complete word intelligence in one call. Free tier — 50 lookups/day.