imperforate

adjective
im·per·fo·rate | \(ˌ)im-ˈpər-f(ə-)rət, -fə-ˌrāt\

Definition of imperforate 

1 : having no opening or aperture specifically : lacking the usual or normal opening

2 of a stamp or a sheet of stamps : lacking perforations or roulettes

First Known Use of imperforate

1673, in the meaning defined at sense 1

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The first known use of imperforate was in 1673

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imperforate

adjective
im·per·fo·rate | \(ˈ)im-ˈpər-f(ə-)rət, -fə-ˌrāt \

Medical Definition of imperforate 

: having no opening or aperture specifically : lacking the usual or normal opening an imperforate hymen an imperforate anus

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