armhole

[ ahrm-hohl ]

/ ˈɑrmˌhoʊl /

an opening in a garment, for the arm.

Origin of armhole

1275–1325; Middle English arm-hol armpit. See arm¹, hole

His coat blew open, disclosing something shining through an armhole of his vest.

The Outdoor Girls at Ocean View |Laura Lee Hope
The seam at the skirt, the armhole, sleeve, and collar are the shorter ones.

Ethnology of the Ungava District, Hudson Bay Territory |Lucien Turner
Each girl will need two lengths for the skirt part of the apron, measuring from the armhole at chest, to the desired length.

Clothing and Health |Helen Kinne
Continue knitting in extra or lesser length to underarm, for armhole and for sleeves.

Beehive for Bairns, Vol. 2 |Various

Work even at armhole edge, and do not work in last st of every row at neck edge, until you have 20 sts.

Juvenile Styles, Volume 4 |Mary Hoyer

armhole

/ (ˈɑːmˌhəʊl) /

the opening in an article of clothing through which the arm passes and to which a sleeve is often fitted