Also called sea loch. a long narrow bay or arm of the sea in Scotland
Word Origin
C14: from Gaelic
Word Origin and History for loch
n.
late 14c., from Gaelic loch "lake, narrow arm of the sea," cognate with Old Irish loch "body of water, lake," Breton lagen, Anglo-Irish lough, Latin lacus (see lake (n.1)). The Loch Ness monster is first attested 1933.