Definition of acicula
aciculae\ə-ˈsi-kyə-ˌlē, -ˌlī\ or
: a needlelike spine, bristle, or crystal
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Origin and Etymology of acicula
borrowed from New Latin, going back to Late Latin acicula, acucula “small needle, small pin for a headdress,”, from Latin acu-, stem of acus “needle” (going back to Indo-European *h₂eḱ-u- “pointed”) + -cula, diminutive suffix — more at 1acute
First Known Use: 1784
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