hose / hōz/ • n. 1. a flexible tube conveying water, used esp. for watering plants and in firefighting.2. [treated as pl.] stockings, socks, and tights (esp. in commercial use): a chorus girl's fishnet hose. ∎ hist. breeches: Elizabethan doublet and hose.• v. [tr.] water, spray, or drench with a hose: he was hosing down the driveway.ORIGIN: Old English hosa, of Germanic origin; related to Dutch hoos ‘stocking’ and German Hosen ‘trousers.’ Originally singular, the term denoted a covering for the leg, sometimes including the foot but sometimes reaching only as far as the ankle.

hose
A. article of clothing for the leg OE.;

B. flexible pipe for conveying liquid XV. Late OE. hosa, -e = OS., OHG., ON. hosa (Du. hoos stocking, water-hose, G. hose) :- Gmc. *χusan-, -ōn. Sense B is prob. from Du.
Hence hosier XV.