Part 227

Emerson.

4. One in the fourth or final year of his collegiate course at an American college; -- originally called senior sophister; also, one in the last year of the course at a professional schools or at a seminary.

Sen*ior"i*ty (?), n. The quality or state of being senior.

Sen"ior*ize (?), v. i. To exercise authority; to rule; to lord it. [R.] Fairfax.

Sen"ior*y (?), n. Seniority. [Obs.] Shak.

Sen"na (?), n. [Cf. It. & Sp. sena, Pg. sene, F. séné; all fr. Ar. san.] 1. (Med.) The leaves of several leguminous plants of the genus Cassia. (C. acutifolia, C. angustifolia, etc.). They constitute a valuable but nauseous cathartic medicine.

2. (Bot.) The plants themselves, native to the East, but now cultivated largely in the south of Europe and in the West Indies.

Bladder senna. (Bot.) See under Bladder. -- Wild senna (Bot.), the Cassia Marilandica, growing in the United States, the leaves of which are used medicinally, like those of the officinal senna.

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Sen"na*chy (?), n. See Seannachie.

Sen"net (?), n. [Properly, a sign given for the entrance or exit of actors, from OF. sinet, signet, dim. of signe. See Signet.] A signal call on a trumpet or cornet for entrance or exit on the stage. [Obs.]

Sen"net, n. (Zoöl.) The barracuda.

Sen"night (?), n. [Contr. fr. sevennight.] The space of seven nights and days; a week. [Written also se'nnight.] [Archaic.] Shak. Tennyson.

Sen"nit (?), n. [Seven + knit.] 1. (Naut.) A braided cord or fabric formed by plaiting together rope yarns or other small stuff.

2. Plaited straw or palm leaves for making hats.

Se*noc"u*lar (?), a. [L. seni six each (fr. sex six) + oculus eye.] Having six eyes. [R.] Derham.

Se*no"ni*an (?), a. [F. sénonien, from the district of Sénonais, in France.] (Geol.) In european geology, a name given to the middle division of the Upper Cretaceous formation.

||Se*ñor" (?), n. [Sp. Cf. Senior.] A Spanish title of courtesy ||corresponding to the English Mr. or Sir; also, a gentleman.

||Se*ño"ra (?), n. [Sp.] A Spanish title of courtesy given to a lady; ||Mrs.; Madam; also, a lady.

||Se`ño*ri"ta (?), n. [Sp.] A Spanish title of courtesy given to a ||young lady; Miss; also, a young lady.

Sens (?), adv. [See Since.] Since. [Obs.] Spenser.

Sen"sate (?), v. t. [imp. & p. p. Sensated (?); p. pr. & vb. n. Sensating.] [See Sensated.] To feel or apprehend more or less distinctly through a sense, or the senses; as, to sensate light, or an odor.

As those of the one are sensated by the ear, so those of the other are by the eye.

R. Hooke.

{ Sen"sate (?), Sen"sa*ted (?), } a. [L. sensatus gifted with sense, intelligent, fr. sensus sense. See Sense.] Felt or apprehended through a sense, or the senses. [R.] Baxter.

Sen*sa"tion (?), n. [Cf. F. sensation. See Sensate.] 1. (Physiol.) An impression, or the consciousness of an impression, made upon the central nervous organ, through the medium of a sensory or afferent nerve or one of the organs of sense; a feeling, or state of consciousness, whether agreeable or disagreeable, produced either by an external object (stimulus), or by some change in the internal state of the body.

Perception is only a special kind of knowledge, and sensation a special kind of feeling. . . . Knowledge and feeling, perception and sensation, though always coexistent, are always in the inverse ratio of each other.

Sir W. Hamilton.