Webster's Revised Unabridged Dictionary · 1913

Loch

Loch (lok) , noun

[Gael. & Olr. loch. See Lake of water.]

A lake; a bay or arm of the sea. [Scottish]

Loch (lok) , noun

[French looch, Arabic la'ūg, an electuary, or any medicine which may be licked or sucked, from la'ūq to lick.]

(Medicine) A kind of medicine to be taken by licking with the tongue; a lambative; a lincture.