PARAMETER 



255 



PARR 



guish bodies usually called magnetic from 

 those that are dia-magnetic; paramagnetism 

 = Attraction by a magnet; diamagnetism= 

 Repulsion. 



Parameter. In crystallography, the portion of 

 an axis between the centre and the surface. 



Paramecium, ( par-a-me si-um ). A simple 

 animal organism, consisting of a cortical 

 layer, lined with sarcode, and filled with a 

 semi-fluid substance: the type of Infusoria. 



Paramorphia, ( par-a-mor'fi-a ). [Para and 

 Morphia, g.v.]=Thebaia, q.v. 



Paramylene, (par-am'i-len). [Para and Amy- 

 lene, <?.?>.] = Diamylene = CioH2o: a liquid 

 hydrocarbon of the olefine series. 



Parapectic acid, (par-a-pek'tik). [Para and 

 Pec tic, q.v.] An amorphous variety of pectic 

 acid. 



Parapodia, (par-a-po'di-a). [Gk. para, beside; 

 poda, feet.] Lateral feet-like processes, found 

 in molluscous and other animals. 



Parapophyses, ( par-a-pof'i-sSz ). [Para and 

 Apophysis, q.v.] Thread-like or narrow leaf- 

 like plates in Muscineae; also a general term 

 for lateral processes. 



Paraselense, (par-a-se-lene). [Gk. para, be- 

 side; selene, moon.]=Mock-moons: prismatic 

 images of the moon seen during the appear- 

 ances of halos. cf. Parahelia. 



Parasita, (par-a-sfta). [Gk. parisitos, para- 

 site.] = Lice, tick, &c., wingless spider-like 

 animals living on mammals and birds. 



Parasites, (par'a-sits). [Parasitos, the Greek 

 word.] Animals or plants feeding at expense 

 of others: not a class of animals or plants, 

 but found in inferior ranks of all classes, 

 commonly aberrant forms. All animals and 

 plants are parasitic at some period of life. 

 cf. Epiphytes. 



Parasitic, ( par-a-sit'ik ). [Parasites, q.v.] 

 P. fungi: mould, mildews, &c. P. nests: 

 of cuckoo, sparrow-hawk, kestrel, starling, 

 gall-flies, &c. 



Parasitica, ( par-a-sit'i-ka). [Gk. parasitos, 

 parasite.] One of Hoaveu's sub-divisions of 

 Insects. 



Parasphenoid, ( par-a-sf e'noid ). [Gk. para, 

 beside; sphenoides, wedge-shaped.) A large 

 bone in the floor of the skull, larger than 

 basi -sphenoid, q.v., in bony fishes aud in 

 Batrachia. 



Parastichies, (par-a-stik'i-ez). [Gk. para, be- 

 side; stickos, row.] Spiral rows. cf. Ortho- 

 stichies. 



Paratartaric acid, separates into dextro-tar- 



taric and Isevo-tartaric acids, v. Tartaric acid. 



Paratonic, (par-a-ton'ik). [Pava and Tonic, 



q.v.] Sensitive to light; used especially of 



plants. 



Parchment, (parch'ment). [Parcfiemin, the 

 French word.] A skin for writing on, pre- 

 pared from goat or sheepskin. Vegetable P., 

 paper modified by chemical action into a sub- 

 stance resembling parchment. 

 Pardalotus, (par-da-16'tus). An Australian 

 bird belonging to Ampelidae. v. Manakins. 

 Parelhc acid, (pa-rel'lik)=C 9 H 6 O 4 : obtained 

 from the lichen Parella; also called Lecanora 

 parella^Parellin. 



. 



(par'idz). [Paris, g.v.]=Trilliace<ie, q.v. 

 l, (pa-ri'e-tal). [L. panes, wall.] Be- 



Parenchyma, (par-enTu-ma). [Gk. para, be- 

 side; en, in; chyma, a pouring.] 1. The sub- 

 stance of the viscera: a tissue composed of 

 rows of rounded cells, with interstices. 2. 

 The cellular tissue in plants. 

 Pargasite, (par'ga-sit). A variety of horn- 

 blende. 



Parhelia, (par-he'li-a). [Gk. para, beside; 

 hehos, sun.]=Mock-suns: bright images of 

 the sun, seen occasionally when a solar halo 

 occurs. 



Parian, (pa'ri-an). [Island of Paros.] P 

 cement: a compound of plaster of Paris and 

 borax. P. marble: a waxy cream-coloured 

 variety of marble. 



Paridae, (pa'ri-de). [Parus, the typical genus. ] 

 Tits: small perching birds; also called Tit- 

 mice. 



Paridigitata, (par-i-di-ji-ta'ta). [L. par, 



equal; digitus, finger.] Extinct Mammalian 



animals, remains of which are found in 



Miocene rocks. 



Parids, ( 



Parietal, 



longing to the walls of the body, or to the 

 side of the cranium. 



Parietaria, (pa-ri-e-ta'ri-a). [L. paries, wall.] 

 =Peilitory: an herb belonging to Urticacese. 

 Parieto-splanchmc, ( pa-rl-e-to-splangk'nik ). 

 [L. paries, wall; splagchnon, viscera.] In 

 Mollusca: a ganglion supplying the viscera, 

 gills, and mantles. 



Paris, (parts). [L. par, equal.]=Herb Paris: 

 an herb belonging to Liliacese. 

 Parisite, (part-sit). A mineral. 

 Parkeria, (par-ke'ri-a). [Mr. Parker.] 1. 

 Arenaceous foraminifera. 2. Plants belong- 

 ing to Polypodiaceae. 



Parkia, (par'ki-a). [Mungo Park.] A plant 

 belonging to Leguminaceffi. P. Africana 

 Doura tree. 



Parmelia, (par-mSli-a). [Gk. parme, shield; 

 eilo, I enclose.] Pale-lichen. P. panetaria 

 =Stone-lichen. v. Lichenales. 

 Parmeliaceae, (par-me-li-a'se-e). [Parmelia, 



q.v.] Leaf-lichens, v. Licheuales. 

 Paxnassia, (par-nas'si-a). [Mount Parnassus.l 

 Grass of Parnassus: a slender, stemless herb, 

 belonging to Saxifragaceae. 

 Paronychiacese, (par-o-mk-i-a'se-g). [Gk. paro- 

 nychia, whitlow.] Knot-worts=Illecebraceae, 

 q.v. 

 Paroquet, (par'S-ket). [Perroqv.et, the French 



name.] v. Parrakeet. 

 Parotid, (pa-rot'id). [Gk. 

 para, near; ous, ear.] 

 P. gland: at the side 

 of the mouth cavity. 

 Parquetry, ( par'ket-ri ). 

 [F. parqu'et, inlaid 

 floor.] Wood -work in 

 patterns, usually for 

 floorings, cf. Marquetry. 

 Parr, par). A young 

 salmon which produces 

 milt; probably the ma- 

 ture condition of a 

 trout, which becomes Paroquet. 

 enjarged by a change to sea diet. cf. Grilse. 



