| paracentral lobule | A division of the medial aspect of the cerebral cortex, lying above the singulate sulcus and bounded by the precentral sulcus in front and the marginal part of the cingulate sulcus behind. Synonym: lobulus paracentralis. (05 Mar 2000) |
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| paracentral nucleus of thalamus | One of the intralaminar nuclei of the thalamus, medial to the central lateral nucleus. Synonym: nucleus paracentralis thalami. (05 Mar 2000) |
| paracentral scotoma | A scotoma adjacent to the fixation point. (05 Mar 2000) |
| paracentric inversion | A basic type of chromosome rearrangement. A segment that does not include the centromere (and so is paracentric) has been snipped out of a chromosome, turned through 180 degrees (inverted), and inserted right back into its original location in chromosome. (12 Dec 1998) |
| paracentrical | Deviating from circularity; changing the distance from a center. <mathematics> Paracentric curve, a curve having the property that, when its plane is placed vertically, a body descending along it, by the force of gravity, will approach to, or recede from, a fixed point or center, by equal distances in equal times; called also a paracentric. Paracentric motton or velocity, the motion or velocity of a revolving body, as a planet, by which it approaches to, or recedes from, the center, without reference to its motion in space, or to its motion as reckoned in any other direction. Origin: Pref. Para- + centric, -ical: cf. F. Paracentrique. Source: Websters Dictionary (01 Mar 1998) |
| paracervical | Connective tissue adjacent to the uterine cervix. (05 Mar 2000) |
| paracervical block anaesthesia | Regional anaesthesia of the cervix uteri by injection of local anaesthetic solution into tissues adjacent to the cervix. (05 Mar 2000) |
| paracervix | The connective tissue of the pelvic floor extending from the fibrous subserous coat of the cervix of the uterus laterally between the layers of the broad ligament. (05 Mar 2000) |
| paracetaldehyde | <chemistry> A polymeric modification of aldehyde obtained as a white crystalline substance. Origin: Pref. Para- + aldehyde. Source: Websters Dictionary (01 Mar 1998) |
| paracetamol | <drug> The generic name for a common nonprescription medication useful in the treatment of mild pain or fever. This is called paracetamol in the UK. [American term] Synonym: paracetamol. (25 Jun 1999) |
| parachlorophenol | A disinfectant effective against most Gram-negative organisms; also available as camphorated parachlorophenol. Synonym: p-chlorophenol. (05 Mar 2000) |
| paracholera | A disease clinically resembling Asiatic cholera but due to a vibrio specifically different from Vibrio cholerae. (05 Mar 2000) |
| parachordal | <anatomy> Situated on either side of the notochord; applied especially to the cartilaginous rudiments of the skull on each side of the anterior part of the notochord. A parachordal cartilage. Origin: Pref. Para- + chordal. Source: Websters Dictionary (01 Mar 1998) |
| parachordal cartilage | Cartilage primordia adjacent on either side to the cephalic portion of the notochord in young embryos; they represent an initial step in the formation of the chondrocranium. (05 Mar 2000) |
| parachordal plate | The cartilage primordia of the base of the skull situated on either side of the cephalic part of the notochord. (05 Mar 2000) |