ANGUSTATION
Source: 524, 566, 567
ANGUSTA'TION, noun [Latin angustus, narrow. See Anger.]The act of making narrow; a straightening, or being made narrow.
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angustation. Angustation, n. the act of making narrow, straitness
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An′gus‐ta″tion (�), n. The act of making narrow; a straitening or contacting. Wiseman.