Oxter

Origin

From Old English ōxta, related to eax ("axis, axle")

"oxter" in Merriam Webster

and eaxl ("shoulder"). See also axis and axon.

Full definition of oxter

Noun

1. (chiefly Scotland, Ireland) The armpit. from 15th c.
• Joyce Ulysses, Episode 12: The Cyclops,And begob there he was passing the door with his books under his oxter and the wife beside him and Corny Kelleher with his wall eye looking in as they went past,...
• 1955, Robin Jenkins, The Cone-Gatherers, Canongate 2012, p. 90:‘It's a small beast,’ he said. ‘I could carry it under my oxter.’