A comprehensive medical dictionary : containing the pronunciation, etymology, and signification of the terms made use of in medicine and the kindred sciences.

Joseph Thomas

Date:: 1865

Credit: A comprehensive medical dictionary : containing the pronunciation, etymology, and signification of the terms made use of in medicine and the kindred sciences. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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$Spectra. If the eye be steadily directed for some time to a white wafer upon a dark ground, and be then turned aside, a well-defined image of the wafer will be perceived, with the colors reversed: the wafer will appear dark, the ground white. This new appearance is termed the accidental color, or ocular spectrum. By using differently colored wafers we obtain the following results:— Color of wafer. Color of spectra. Black White. Red Bluish-green. Orange Blue. Yellow Indigo. n f Violet with a ureen < ,.,,, , ( little red. Blue Orange-red. Indigo Orange-yellow. Violet Bluish-green. Darwin classes the Spectra under the two heads of direct and reverse; the former depending on the permanence of the impression, the latter upon exhaus- tion. Accidentia,* ak-se-den'she-a. [From ac'cido, to happen, ac'cidens, hap- pening, that which happens.] A chance or occurrence happening to one unexpectedly: an ac'cident. Ac-cip'i-teiv:;: [From accip'io, to take.] A bird of prey. In the plural {Accipitres, ak-sip'e-trez) applied to an order of birds, including the hawk, eagle, etc., called also Rapa'ces, and Rapto'res, from their rapacious or pre- datory character. Ac-cli'mat-ed. [Aecliina'tus. Fr. acclimate, akvklevinavta'.] Thoroughly accustomed to a climate. Ac-cli-ma-ta-za'tion. [Acclimati- za'tio, o'jiis.] The process or state of being acclimated. Ac-cli'vis.* [From ad, to, and cli'vus, the side of a hill.] Sloping upwards. Applied to a muscle of the abdomen, from the oblique ascent of its fibres, the Obli'quus inter'nus. Accouchement (Fr.), akvkoosh'moN«'. [From accuueher, ak'koo\sha', to put to bed, to deliver.] The act of being delivered; delivery. Accoucheur, akrkooNshuit'. [From the same.] A man-midwife; an obstetri- cian. Ac-cre'tion. [Accre'iio, o'm's ; from ad, to, and eres'co, cre'tum, to grow.] The process by which nutrient particles are added to the various tissues. The adhering together of parts naturally separate, as the fingers, etc. 14 Acephala. See Acephalcs. Accphalia,* as-e-fa'le-a. [From a, priv., and KecpaXij, the head.] A form of foetal monstrosity, consisting in the want of the head. Acephalobrachia,* a-sefVlo-bra- ki'a. [From a, priv.,KttyciXf), the head, and fipaxitov, the arm.] A form of foetal monstrosity, consisting in the ab- sence of head and arms. A-cephva-lo-fora-chi'us.* [From the same.] A monster-foetus, having neither head nor arms. A-ceph'a-lo-car'di-a.* [From a, priv., K£<pa\f), the head, and Kapdia, the heart.] A form of monstrosity, con- sisting in the absence of head and heart. A-cephva-lo-car'di-us.* [From the same.] A monster-fcetus, without head and heart. Acephalochirus,* or Acephalo- cheirus,* a-sefva-lo-ki'riis. [From a, priv., KscpaXii, the head, and \tip, the hand.] A monster-fcetus, without head and hands. Acephalocyst,* a-sef'a-lo-sist. [Aceph^alocys'tis; from a, priv., K£tpa\rj, the head, and kvcttis, a bladder.] The headless hydatid, formed like a bladder. A-ceph'a-lo-g-as'ter.* [From a, priv., Kctbah'i, the head, and yew-ftp, the stomach or belly.] A monster- fcetus, without head, chest, and upper part of the belly. A-c^p^a-lo-gas'tri-a.* [From the same.] A form of monstrosity, consist- ing in the want of head, chest, and belly. A-ceph'a-lo-po'di-a.* [From a, priv., K£ij)ah), the head, and xovs, tto5<'>s, the foot.] A form of monstrosity, consist- ing in the absence of head and feet. A-cephya-lop'o-dus.* [From the same.] A monster-foetus, without head and feet. Acephalorachia,* a-sefxa-lo-ra'- ke-a. [From a, priv., KtcpaXfi, the head, and pdxis, the spine.] A form of mon- strosity, consisting in the want of head and spinal column. A-cephva-lo-ra'chI-us.* [From the same.] A monster-foetus, without head and spinal column. Accphalostonia. See Acephalos- TOMUS. A-ccphva-lo-sto'mi-a.* [From a, priv., xapaXfi, the head, and aropa. a mouth.] A form of monstrosity, con- sisting in the want of a head, but with an aperture like a mouth.$