pinnate

adjective
pin·nate | \ ˈpi-ˌnāt \

Definition of pinnate 

: resembling a feather especially in having similar parts arranged on opposite sides of an axis like the barbs on the rachis of a feather a pinnate leaf — see leaf illustration

Other words from pinnate

pinnately adverb

First Known Use of pinnate

1687, in the meaning defined above

History and Etymology for pinnate

New Latin pinnatus, from Latin, feathered, from pinna feather, wing, fin

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The first known use of pinnate was in 1687

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