reentrant

adjective
re·en·trant | \(ˌ)rē-ˈen-trənt \

Definition of reentrant 

(Entry 1 of 2)

: directed inward

reentrant

noun

Definition of reentrant (Entry 2 of 2)

1 : one that reenters

2 : one that is reentrant

3 : an indentation in a landform

First Known Use of reentrant

Adjective

1780, in the meaning defined above

Noun

1893, in the meaning defined at sense 3

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The first known use of reentrant was in 1780

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