Tacamahac
(Tac"a*ma*hac` Tac`a*ma*ha"ca) n.
1. A bitter balsamic resin obtained from tropical American trees of the genus Elaphrium (E. tomentosum
and E. Tacamahaca), and also from East Indian trees of the genus Calophyllum; also, the resinous
exhudation of the balsam poplar.
2. (Bot.) Any tree yielding tacamahac resin, especially, in North America, the balsam poplar, or balm of
Gilead
Tacaud
(Ta*caud") n. [Cf. F. tacaud. See Tomcod.] (Zoöl.) The bib, or whiting pout. [Prov. Eng.]
Tace
(Tace) n. The cross, or church, of St. Antony. See Illust. under Cross, n. Mollett.
Tace
(Tace), n. See Tasse. Fairholt.
Tacet
(||Ta"cet) v. impers. [L., it is silent, 3d pers.pr. of tacere to be silent.] (Mus.) It is silent; — a
direction for a vocal or instrumental part to be silent during a whole movement.
Tache
(Tache) n. [See Tack a kind of nail.] Something used for taking hold or holding; a catch; a loop; a
button. [Obs.] Ex. xxvi. 6.
Tache
(Tache), n. [F. tache spot. See Techy.] A spot, stain, or blemish. [Obs.] Warner.
Tachhydrite
(Tach*hy"drite) n. [Gr. tachy`s quick + "y`dwr water. So named from its ready deliquescence.]
(Min.) A hydrous chloride of calcium and magnesium occurring in yellowish masses which rapidly deliquesce
upon exposure. It is found in the salt mines at Stassfurt.
Tachina
(||Tach"i*na) n.; pl. Tachinæ [NL., fr. Gr. for swift.] (Zoöl.) Any one of numerous species of
Diptera belonging to Tachina and allied genera. Their larvæ are external parasites of other insects.
Tachometer
(Ta*chom"e*ter) n. [Gr. swiftness, speed (fr. tachy`s quick) + -meter: cf. F. tachomètre.]
An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.
Specifically: —
(a) An instrument for measuring the velocity of running water in a river or canal, consisting of a wheel
with inclined vanes, which is turned by the current. The rotations of the wheel are recorded by clockwork.
(b) An instrument for showing at any moment the speed of a revolving shaft, consisting of a delicate
revolving conical pendulum which is driven by the shaft, and the action of which by change of speed
moves a pointer which indicates the speed on a graduated dial.
(c) (Physiol.) An instrument for measuring the velocity of the blood; a hæmatachometer.
Tachydidaxy
(Tach"y*di*dax`y) n. [Gr. tachy`s quick + teaching.] A short or rapid method of instructing.
[R.]
Tachyglossa
(||Tach`y*glos"sa) n. pl. [NL., fr. Gr. tachy`s quick + tongue.] (Zoöl.) A division of monotremes
which comprises the spiny ant-eaters of Australia and New Guinea. See Illust. under Echidna.
Tachygraphic
(Tach`y*graph"ic Tach`y*graph"ic*al) a. [Cf. F. tachygraphique.] Of or pertaining to
tachygraphy; written in shorthand.
Tachygraphy
(Ta*chyg"ra*phy) n. [Gr. tachy`s quick + -graphy: cf. F. tachygraphie.] The art or practice
of rapid writing; shorthand writing; stenography. I. Taylor
