A dictionary of terms used in medicine and the collateral sciences / by Richard D. Hoblyn.

  • Richard Hoblyn
Date:
1858
Catalogue details

Licence: Public Domain Mark

Credit: A dictionary of terms used in medicine and the collateral sciences / by Richard D. Hoblyn. Source: Wellcome Collection.

    641/692 (page 613)
    1. Tragacantliin or Adraqanttn. Soluble gum of tragacanth. From its resemblance to gum arabic, it has been termed arahine. 2. Bassorin. The insoluble part of gum tragacanth, named ft-om its similarity to gum bassora. TRA'GUS (x^jiiyov, a goat). A small eminence situated over the meatus externus of the ear, upon which hair often grows like the beard of a goat. Tnifficus. A muscle of triangular form, arising from the middle and outer part of the concha, and inserted into the tip of the tragus, which it pulls forward. See Anli-traf/icus. TRANSCA'LENCY {tnms, through, caleo, to be warm). A term expressive of the property which certain bodies possess of transmitting the rays of heat tliroiigh their substance. TRANSCENDE'NTAL (transcendo, to go beyond a certain limit). In philosopliy, this term denotes that which is beyond the reach of our senses, as distinguished from what is empirical ; it is thus synonymoijs with metaphysical Tnmscetidental Anatmny is that which investigates the model upon which the animal frame is constructed, and treats of the homologies which exist between the parts of the body, or the corre- siiondence of parts bcycmd that which appears to the external sense; thus, the wing of a bird is the Iwmologue of the arm of a man ; the leaf of a plant is the liomologue of the lung of an animal; the human scapula is the rib of the occiput, &c. See Homolouies. TRANSFORMA'TION (transformo, to change from one shape into another). Metamorphosis. The change which tiikes place in the com- ponent parts of the blood, during its passage from- the minute arteries through the capillary system of vessels into the radicles of the venous system. There are three kinds of change : 1. Transformation of the components of the blood into the organized substance of the different organs, termed intus-siisecptio or nutrition. 2. Transformation of the components of the blood on the free sur- face of an organ into a solid unorganized substance, which is the mode ot growth of tlie non-vascular textures, or appositio. 3. Transformation of the components of the blood into a fluid matter, rin f^^'S',^,^ ° surface of the organ, or secretion.—MnWtv. IKAJNblTlON OP MATTER. A term denotins the continuous processes ot decomposition and recomposition which take place in organic substances. Matters absorbed from the earth and the air are transformed into food adapted to the support of herbivorous animals, and by them are transformed into food suited to carnivorous animals. Un the death of animals and plants, these return to the earth and to the ''^ TR ?wI!]1-'t Jc^TAxt'''' «stenin<-e of another generation. 1KAW !5t U SI ON (transjundo, to pour from one vessel into another). The operation of transfusing the blood of one animal into the veins of another. tbJ^^i! r^'^'^i^.^'^ ^P^^- Tl'i^ is made by careftilly evaporating tbe alcohohe solution of soap The solution it'self is sold under thi tran1uda't7om'<?' ^T' P°''f--^ i--^ fl„; 1 .1 , (transudo, to perspire). The process by which fluids pass through porous substances. Thus, the arteries and veins are nl I'fl/'T™!™'''' r^^'^'S porous ; and hence, as parting with con- . v i 1. ^ t™^^--'°n- and imbibing extraneous fluids by capil lary attraction. See Secretion. ' ^