Part 423

Si`nu*pal"li*ate (?), a. (Zoöl.) Having a pallial sinus. See under Sinus.

Si"nus (?), n.; pl. L. Sinus, E. Sinuses (#). [L., a bent surface, a curve, the folds or bosom of a garment, etc., a bay. Cf. Sine, n.] 1. An opening; a hollow; a bending.

2. A bay of the sea; a recess in the shore.

3. (Anat. & Zoöl.) A cavity; a depression. Specifically: (a) A cavity in a bone or other part, either closed or with a narrow opening. (b) A dilated vessel or canal.

4. (Med.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.

5. (Bot.) A depression between adjoining lobes.

A sinus may be rounded, as in the leaf of the white oak, or acute, as in that of the red maple.

Pallial sinus. (Zoöl.) See under Pallial. -- Sinus venosus (?). [L., venous dilatation.] (Anat.) (a) The main part of the cavity of the right auricle of the heart in the higher vertebrates. (b) In the lower vertebrates, a distinct chamber of the heart formed by the union of the large systematic veins and opening into the auricle.

Si"nus*oid (?), n. [Sinus + - oid.] (Geom.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being y = a sin x. It is also called the curve of sines.

Si`nus*oid"al (?), a. (Geom.) Of or pertaining to a sinusoid; like a sinusoid.

Sio"goon (?), n. See Shogun.

Sio*goon"ate (?), n. See Shogunate.

Sioux (?), n. sing. & pl. (Ethnol.) See Dakotas.

Sip (sp), v. t. [imp. & p. p. Sipped (spt); p. pr. & vb. n. Sipping.] [OE. sippen; akin to OD. sippen, and AS. span to sip, suck up, drink. See Sup, v. t.] 1. To drink or imbibe in small quantities; especially, to take in with the lips in small quantities, as a liquid; as, to sip tea. "Every herb that sips the dew." Milton.

2. To draw into the mouth; to suck up; as, a bee sips nectar from the flowers.

3. To taste the liquor of; to drink out of. [Poetic]

They skim the floods, and sip the purple flowers.

Dryden.

Sip, v. i. To drink a small quantity; to take a fluid with the lips; to take a sip or sips of something.

raised it to her mouth with sober grace; Then, sipping, offered to the next in place.

Dryden.

Sip, n. 1. The act of sipping; the taking of a liquid with the lips.

2. A small draught taken with the lips; a slight taste.

One sip of this Will bathe the drooping spirits in delight Beyond the bliss of dreams.

Milton.

A sip is all that the public ever care to take from reservoirs of abstract philosophy.

De Quincey.

Sip"age (?), n. See Seepage. [Scot. & U.S.]