| Purkinje's fibres | <cardiology, pathology> A group of specialised cardiac muscle cells that conduct electrical impulses through the heart and are involved in regulating the heart beat. The fibres form the terminal portion of the heart conduction system and have central granulated protoplasm containing one or two nuclei and a transversely striated peripheral portion. They are the terminal ramifications of the conducting system of the heart found beneath the endocardium of the ventricles. See: conducting system of heart. (10 Jul 2002) |
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| Purkinje's figures | <ophthalmology> Shadows of the retinal vessels, seen as dark lines on a reddish field when a light enters the eye through the sclera and not the pupil. (05 Mar 2000) |
| Purkinje's layer | The layer of Purkinje cells between the molecular and granular layers of the cerebellar cortex. Synonym: stratum neuronorum piriformium, ganglionic layer of cerebellar cortex, layer of piriform neurons, Purkinje's layer, stratum gangliosum cerebelli. (05 Mar 2000) |
| Purkinje's network | <cardiology, physiology> The network formed by Purkinje's fibres beneath the endocardium. (05 Mar 2000) |
| Purkinje's phenomenon | <ophthalmology> In the light-adapted eye, the region of maximal brightness is in the yellow; in the dark-adapted eye, the region of maximal brightness is in the green. Synonym: Purkinje effect, Purkinje shift. (05 Mar 2000) |
| Purkinje, Johannes von | <person> Bohemian anatomist and physiologist, 1787-1869. See: Purkinje conduction, Purkinje images, Purkinje shift, Purkinje system, Purkinje cell, Purkinje's corpuscle, Purkinje's fibres, Purkinje's figures, Purkinje's layer, Purkinje's network, Purkinje's phenomenon, Purkinje-Sanson images. (05 Mar 2000) |
| Purkinje-Sanson images | <ophthalmology, physiology> The two images formed by the anterior and posterior surfaces of the cornea and the two images formed by the anterior and posterior surfaces of the lens. Synonym: catatropic image, Purkinje images, Sanson's images. (05 Mar 2000) |
| purl | 1. To run swiftly round, as a small stream flowing among stones or other obstructions; to eddy; also, to make a murmuring sound, as water does in running over or through obstructions. "Swift o'er the rolling pebbles, down the hills, Louder and louder purl the falling rills." (Pope) 2. [Perh. Fr. F. Perler to pearl, to bead. See Pearl] To rise in circles, ripples, or undulations; to curl; to mantle. "thin winding breath which purled up to the sky." (Shak) Origin: Cf. Sw. Porla, and E. Pur to murmur as a cat. 1. A circle made by the notion of a fluid; an eddy; a ripple. "Whose stream an easy breath doth seem to blow, Which on the sparkling gravel runs in purles, As though the waves had been of silver curls." (Drayton) 2. A gentle murmur, as that produced by the running of a liquid among obstructions; as, the purl of a brook. 3. [Perh. From F.perler, v. See Purl to mantle] Malt liquor, medicated or spiced; formerly, ale or beer in which wormwood or other bitter herbs had been infused, and which was regarded as tonic; at present, hot beer mixed with gin, sugar, and spices. "Drank a glass of purl to recover appetite." . "Drinking hot purl, and smoking pipes." . 4. <zoology> A tern. See: Purl. Source: Websters Dictionary (01 Mar 1998) |
| purlieu | 1. Originally, the ground near a royal forest, which, having been unlawfully added to the forest, was afterwards severed from it, and disafforested so as to remit to the former owners their rights. "Then as a tiger, who by chance hath spied In some purlieu two gentle fawns at play." (Milton) 2. Hence, the outer portion of any place; an adjacent district; environs; neighborhood. "The purlieus of St. James." "brokers had been incessantly plying for custom in the purlieus of the court." (Macaulay) Origin: Corrupted (by influence of lieu place) fr. OF. Puralee, poralee (equiv. To LL. Perambulatio a survey of boundaries, originally, a going through); por (L. Pro, confused, however, with L. Per through) + alee. See Pro-, and Alley Alternative forms: pourlieu. Source: Websters Dictionary (01 Mar 1998) |
| Purmann's method | Treatment of aneurysm by extirpation of the sac. (05 Mar 2000) |
| Purmann, Matthaeus | <person> German surgeon, 1648-1721. See: Purmann's method. (05 Mar 2000) |
| purocoll | <chemistry> A yellow crystalline substance allied to pyrrol, obtained by the distillation of gelatin. Origin: Puro- + Gr. Glue. Source: Websters Dictionary (01 Mar 1998) |
| puromucous | Synonym: mucopurulent. Origin: L. Pus (pur-), pus, + mucus, mucus (05 Mar 2000) |
| puromycin | <drug> An antibiotic that acts as an aminoacyl tRNA analogue. Binds to the A site on the ribosome, forms a peptide linkage with the growing chain and then causes premature termination. (18 Nov 1997) |
| puromycin aminonucleoside | <chemical> Puromycin derivative that lacks the methoxyphenylalanyl group on the amine of the sugar ring. It is an antibiotic with antineoplastic properties and can cause nephrosis. Pharmacological action: antibiotics, antineoplastic, antimetabolites, antineoplastic. Chemical name: Adenosine, 3'-amino-3'-deoxy-N,N-dimethyl- (12 Dec 1998) |