Tachometer, tā-kom′e-tėr, n. an instrument for measuring variations in the velocity of machines.—Also Tachym′eter. [Gr. tachos, speed, metron, a measure.]
Tachygraphy, tā-kig′ra-fi, n. stenography, the art of writing in abbreviations.—n. Tachyg′rapher.—adjs. Tachygrapn′ic, -al. [Gr. tachys, swift, graphein, to write.]
Tachylite, tak′i-līt, n. a black opaque natural glass, which results from the rapid cooling of molten basalt, occurring as a thin selvage to dikes and veins of intrusive basalt.—adj. Tachylit′ic.
Tachymeter, tā-kim′e-tėr, n. a surveying instrument—also Tacheom′eter.—n. Tachym′etry, scientific use of the tachymeter.
Tacit, tas′it, adj. implied, but not expressed by words: silent, giving no sound.—adv. Tac′itly.—n. Tac′itness.—adj. Tac′iturn, habitually tacit or silent: not fond of talking: reserved in speech.—ns. Tac′iturnist, one habitually taciturn; Taciturn′ity, habitual silence: reserve in speaking.—adv. Tac′iturnly. [L. tacitus, pa.p. of tacēre, to be silent.]
Tack, tak, n. a short, sharp nail with a broad head: a fastening, a long temporary stitch: the weather clew or foremost lower corner of any of the courses, or of any sail set with a boom or gaff, or of a flag, also the rope by which such clew or tack is confined or fastened: the course of a ship in reference to the position of her sails: a determinate course, the art of tacking, hence a change of policy, a strategical move: a shelf for drying cheese: term of a lease: adhesiveness, sticky condition, as of varnish, &c.—v.t. to attach or fasten, esp. in a slight manner, as by tacks.—v.i. to change the course or tack of a ship by shifting the position of the sails: to shift one's position, to veer.—adj. Tack′y, adhesive, viscous. [Most prob. Celt., Ir. taca, a pin, Bret. tach, a nail.]
Tack, tak, n. (prov.) any distinctive and permanent flavour.
Tack, tak, n. food generally, fare, esp. of the bread kind, as hard tack, soft tack, &c.
Tacket, tak′et, n. (Scot.) a hobnail in the soles of strong shoes.
Tackle, tak′l, n. the ropes, rigging, &c. of a ship: tools, weapons: ropes, &c., for raising heavy weights: a pulley.—v.t. to harness: (prov.) to seize or take hold of, attack, fasten upon.—v.i. to get a hold of.—adj. Tack′led, made of ropes tackled together.—ns. Tack′ling, furniture or apparatus belonging to the masts, yards, &c. of a ship: harness for drawing a carriage: tackle or instruments; Tacks′man, a tenant or lessee. [Scand., Sw. tackel—Ice. taka, to take.]