The armhole in a garment; the curved opening where a sleeve is attached to the bodice of clothing.
From Middle English, possibly from 'arm's eye' (the opening for the arm). This is an old sewing and tailoring term.
Armscye is one of those technical words that sounds made-up but is dead serious—tailors spend enormous time getting this measurement right because a bad armscye means you can't move your arm properly, no matter how good the rest of the shirt is.
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