A watercourse.
A vein of metallic ore that lies within definite boundaries, or within a fissure.
A rich source of supply.
A snorkel parka.
A retractable tube fitted in diesel-engine submarines to allow sufficient ventilation that the engines may be used at periscope depth.
A hollow tube, held in the mouth, or mounted on and opening into a diving mask, used by swimmers for breathing underwater.
To use a snorkel.