plural noun
Am·​a·​ryl·​li·​da·​ce·​ae | \ ˌaməˌriləˈdāsēˌē\

Definition of Amaryllidaceae

: a family of plants (order Liliales) found mostly in tropical regions and having perfect showy flowers with the tube of the perianth adnate to the ovary

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First Known Use of Amaryllidaceae

1836, in the meaning defined above

History and Etymology for Amaryllidaceae

New Latin, from Amaryllid-, Amaryllis, type genus + -aceae

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The first known use of Amaryllidaceae was in 1836

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readily or continually undergoing change

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