| paralactic | <physiology> Designating an acid called paralactic acid. See Lactic acid, under Lactic. Origin: Pref. Para- + lactic. Source: Websters Dictionary (01 Mar 1998) |
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| paralalia | Any speech defect; especially one in which one letter is habitually substituted for another. Origin: para-+ G. Lalia, talking (05 Mar 2000) |
| paralalia literalis | <physiology> A disturbance in the formation of sounds. It is due essentially to long-continued spasmodic contraction of the diaphragm, by which expiration is preented, and hence it may be considered as a spasmodic inspiration. Source: Websters Dictionary (01 Mar 1998) |
| paralambdacism | Mispronunciation of the letter l, or the substitution of some other letter for it. See: lambdacism. Origin: para-+ G. Lambda, letter l (05 Mar 2000) |
| paralbumin | <physiology> A proteidlike body found in the fluid from ovarian cysts and elsewhere. It is generally associated with a substance related to, if not identical with, glycogen. Origin: Pref. Para- + albumin. Source: Websters Dictionary (01 Mar 1998) |
| paraldehyde | <chemistry> A polymeric modification of aldehyde obtained as a white crystalline substance. Origin: Pref. Para- + aldehyde. Source: Websters Dictionary (01 Mar 1998) |
| paralectotype | <zoology> Any one of the original syntypes remaining after the selection of a lectotype. (09 Jan 1998) |
| paraleprosis | Presence of certain trophic or nerve changes suggesting an attenuated form of leprosy in regions where the disease has long prevailed. (05 Mar 2000) |
| paralepsy | 1. A temporary attack of mental inertia and hopelessness. 2. A sudden alteration in mood or emotional tension. Origin: G. Para-+ lepsis, seizure (05 Mar 2000) |
| paralexia | Misapprehension of written or printed words, other meaningless words being substituted for them in reading. Origin: para-+ G. Lexis, speech (05 Mar 2000) |
| paralgesia | Painful paresthesia; any disorder or abnormality of the sense of pain. Origin: para-+ G. Algesis, the sense of pain (05 Mar 2000) |
| paralgia | Abnormal or unusual pain. Origin: para-+ G. Algos, pain (05 Mar 2000) |
| paralipophobia | <psychology> Morbid fear of neglect or omission of some duty. Origin: G. Paraleipo, to omit, pass over, + phobos, fear (05 Mar 2000) |
| parallactic | Relating to a parallax. (05 Mar 2000) |
| parallax | 1. The apparent displacement, or difference of position, of an object, as seen from two different stations, or points of view. 2. <astronomy> The apparent difference in position of a body (as the sun, or a star) as seen from some point on the earth's surface, and as seen from some other conventional point, as the earth's center or the sun. Annual parallax, the greatest value of the heliocentric parallax, or the greatest annual apparent change of place of a body as seen from the earth and sun; as, the annual parallax of a fixed star. Binocular parallax, the apparent difference in position of an object as seen separately by one eye, and then by the other, the head remaining unmoved. Diurnal, or Geocentric, parallax, the parallax of a body with reference to the earth's center. This is the kind of parallax that is generally understood when the term is used without qualification. Heliocentric parallax, the parallax of a body with reference to the sun, or the angle subtended at the body by lines drawn from it to the earth and sun; as, the heliocentric parallax of a planet. Horizontal parallax, the geocentric parallx of a heavenly body when in the horizon, or the angle subtended at the body by the earth's radius. Optical parallax, the apparent displacement in position undergone by an object when viewed by either eye singly. Parallax of the cross wires (of an optical instrument), their apparent displacement when the eye changes its position, caused by their not being exactly in the focus of the object glass. Stellar parallax, the annual parallax of a fixed star. Origin: Gr. Alternation, the mutual inclination of two lines forming an angle, fr. To change a little, go aside, deviate; beside, beyond + to change: cf. F. Parallaxe. Cf. Parallel. Source: Websters Dictionary (01 Mar 1998) |