grandam

noun
gran·​dam | \ˈgran-ˌdam, -dəm\

Definition of grandam 

1 or grandame \ ˈgran-​ˌdām \

a : grandmother

b : an old woman

2 or granddam \ ˈgran-​ˌdam , -​dəm \ : a dam's or sire's dam used of an animal

First Known Use of grandam

13th century, in the meaning defined at sense 1a

History and Etymology for grandam

Middle English graundam, from Anglo-French graund dame, literally, great lady

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The first known use of grandam was in the 13th century

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