(Tra"cer/y) n.; pl. Traceries (Arch.) Ornamental work with rambled lines. Especially: — (a) The decorative head of a Gothic window.

Window tracery is of two sorts, plate tracery and bar tracery. Plate tracery, common in Italy, consists of a series of ornamental patterns cut through a flat plate of stone. Bar tracery is a decorative pattern formed by the curves and intersections of the molded bars of the mullions. Window tracery is imitated in many decorative objects, as panels of wood or metal either pierced or in relief. See also Stump tracery under Stump, and Fan tracery under Fan.

(b) A similar decoration in some styles of vaulting, the ribs of the vault giving off the minor bars of which the tracery is composed.

(Tra"che*a) n.; pl. Tracheæ [NL.,from L. trachia, Gr. trachei^a from rough, rugged: cf. F. trachée.]

1. (Anat.) The windpipe. See Illust. of Lung.

2. (Zoöl.) One of the respiratory tubes of insects and arachnids.

3. (Bot.) One of the large cells in woody tissue which have spiral, annular, or other markings, and are connected longitudinally so as to form continuous ducts.

(Tra"che*al) a. [Cf.F. tracheal.] Of or pertaining to the trachea; like a trachea.

(||Tra`che*a"ri*a) n. pl. [NL.] (Zoöl.) A division of Arachnida including those that breathe only by means of tracheæ. It includes the mites, ticks, false scorpions, and harvestmen.

(Tra"che*a*ry) a. Tracheal; breathing by means of tracheæ.n. (Zoöl.) One of the Trachearia.

(||Tra`che*a"ta) n. pl. [NL.] (Zoöl.) An extensive division of arthropods comprising all those which breathe by tracheæ, as distinguished from Crustacea, which breathe by means of branchiæ.

(Tra"che*ate) a. (Zoöl.) Breathing by means of tracheæ; of or pertaining to the Tracheata.

(Tra"che*ate), n. (Zoöl.) Any arthropod having tracheæ; one of the Tracheata.

(Tra"che*id) n. (Bot.) A wood cell with spiral or other markings and closed throughout, as in pine wood.

(||Tra`che*i"tis) n. [NL. See itis.] (Med.) Inflammation of the trachea, or windpipe.

(Tra*chel"i*dan) n. (Zoöl.) Any one of a tribe of beetles (Trachelides) which have the head supported on a pedicel. The oil beetles and the Cantharides are examples.

  By PanEris using Melati.

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