ZOOXANTHELLA 



1632 



ZYGOZOOSPORE 



Zooxanthella (zo-o-zan-thel' -ah) [£<poi>, animal ; gavdot;, 

 yellow: pi. , Zooxanthelld']. In biology, one of the 

 yellow pigment-granules forming the phaeodium of cer- 

 tain radiolarians. 



Zopissa (zo-pis'-ah) [^u-iooa]. In the older phar- 

 macy, the pitch and tar scraped from a ship's sides. 

 It was regarded as a strong xerantic and discutient 

 remedy. 



Zoster (zos'-ter) [^uarijp, a girdle]. See Herpes zoster. 

 Z. atypicus gangraenosus et hystericus. Kaposi's 

 term for a vesicular affection characterized by an erup- 

 tion of vesicles and papules, chiefly in groups, followed . 

 by central scabbing, and which was often surrounded by 

 a corona of pus or minute pustules. In some parts, from 

 coalescence, large areas of gangrene are produced, fol- 

 lowed by sloughing, and keloid development in the 

 scar. The eruption is symmetric, shows a marked 

 tendency to recur, and occurs in hysteric individuals. 

 Z. auricularis, a form of zoster affecting the ear. 

 Z. brachialis, zoster affecting the arm or forearm. 

 Z. capillitii et frontalis, zoster of the forehead and 

 scalp over the distribution of the first branch of the 

 fifth nerve. Z. cerebralis, zoster which sometimes 

 affects the whole of one side of the body and is of 

 cerebral origin. Z. cervico-subclavicularis, zoster 

 affecting the neck and anterior portion of the chest. 

 Z. facialis, zoster in the distribution of the trigeminus 

 nerve. Z., Herpes, shingles. An acute herpetic 

 vesicular eruption in the distribution of a cutaneous 

 nerve, often an intercostal nerve. Z. hystericus, 

 zoster due to hysteria. Z. lumbo-femoralis, zoster 

 appearing on the nates, thigh, and calf of the leg. 

 Z. lumbo-inguinalis, zoster of the back and groin. 

 Z. ophthalmicus, an eruption in the course of the 

 ophthalmic division of the fifth nerve. It is confined 

 to the orbital region, the side of the nose, the forehead, 

 and the anterior part of the scalp. Z. pectoralis, 

 zoster affecting the pectoral region. Z. perinsealis, 

 zoster affecting the vulva, or the penis and scrotum, 

 and the perineum. 



Zuckerkandl's Convolution. See Convolutions , Table 



Zygadenus (zi-gad' '-en-us) [C,vy6v, yoke ; adfjv, gland]. 

 A genus of liliaceous plants, mostly N. American, 

 the zygadenes. Z. venenosus, of the Pacific States 

 [death camass, or hogs' potato), is a violent poison, 

 narcotic, convulsant, and acrid stimulant. Unof. 



Zygal (zi'-gal) \f,vyov, yoke]. Yoked; applied by 

 Wilder to cerebral fissures which, like the paroccipital , 

 consist of two pair of branches connected by a stem 

 or zygon. 



Zygantrum (zi-gan'-trum) [£vy6v, yoke ; avrpov, cave]. 

 In biology, a depression on the posterior face of the 

 neural arch of each vertebra of certain reptiles, receiv- 

 ing the zygosphene of the succeeding vertebra and thus 

 interlocking the vertebrae. 



Zygapophysial (zi-gap-o-fiz' f -e-al) \{,vy6v, yoke ; and- 

 (ftvoig, apophysis]. Pertaining to a zygapophysis. 



Zygapophysis (zi-gap-off'-is-is) \f,vy6v, yoke ; apophy- 

 sis]. Any articular or (so-called) oblique process of 

 a vertebra. 



Zygobranchiate (zi-go- brang'- he -at) \_^vy6v, yoke ; 

 Pp<*YX ia > g'" s ]- I n biology, having paired and, as it 

 were, yoked gills or ctenidia. 



Zygocardiac (zi-go-kar' -de-ak) \f,vy6v, yoke ; mpfiia, 

 heart]. In biology, denoting a certain hard protuber- 

 ance of the stomach of a crustacean, formed by a 

 thickening of the chitinous lining of the cardiac divi- 

 sion. 



Zygodactylism (zi-go-dak'-til-izm) \f,vy6v, yoke ; ti&K- 

 tvImc-, finger]. The yoking of the toes of a bird's foot 

 in anterior and posterior pairs. 



Zygoite (zi'-go-il) \_C,vy6v, yoke]. In biology, the or- 

 ganism resulting from the process of zygosis, or conju- 

 gation of two gametes. 



Zygolabialis (zi-go-la-be-a' -lis) \f,vyov, yoke ; labium, 

 lip]. The zygomaticus minor muscle. See Muscles, 

 Table of. 



Zygoma (zi-go' -ma h) [£,vyu[ia, the cheek-bone]. The 

 arch in the bones of the face formed by the interartic- 

 ulation of the temporal with the malar bone. 



Zygomatic (zi-go-mat'-ik) [^vyo/tia, zygoma]. Pertain- 

 ing to the zygoma, or cheek-bone. 



Zygomatico-auricular (zi-go-maf ' -ik-o-aiv-rik' ' -u-lar) 

 \_^vyufia, zygoma; auricularis, of the ear]. Pertain- 

 ing to the zygoma and the auricle. 



Zygomatico-auricularis (zi-go-maf ' -ik-o-aw-rik-u-la' '• 

 ris) [^vyufia, zygoma; auricularis, of the ear]. A 

 muscle of the external ear ; the attrahens aurem. 

 See Muscles, Table of. 



Zygomaticofacial (zi-go-mat-ik-o-fa'-shal) [^ 

 zygoma; fades, face]. Pertaining to the zygoma 

 and the face. 



Zygomaticotemporal (zi -go - mat -ik- o - tem'-po-ral ) 

 [^ryufia, zygoma; temporal]. Pertaining to the zygo- 

 ma and the temporal bone or fossa. 



Zygomaticus (zi-go- mat'- ik- us) \f,vyufia, zygoma]. 

 One of several small subcutaneous muscles arising from 

 or in relation with the zygoma. See Muscles, Tai 



Zygomorphic (zi-go-mor'-fk). Same as Zygomotphous. 



Zygomorphism (zi-go-mor' ' -fizm) \f,vyov, yoke ; p> 

 form]. The character of being zygomorphous. 



Zygomorphous (zi-go-mor' -fus) \_C,vy6v, yoke; / 

 form]. In biology, applied to such flowers as may be 

 divided into similar halves in one plane, or into similar 

 halves in two planes at right angles to one anothei 

 in which, the halves produced by the two bisections are 

 of different shapes. 



Zygomorphy (zi'-go-mor-fe). Same as Zygomorphism. 



Zygon (zi'-gon) \f,V)6v, yolk]. In the cerebrum, 

 the bar that connects the two pairs of branches of a 

 zygal fissure. 



Zygophyte (zi' -go-fit) \i,vybv, yoke; <pvr6v, plant]. In 

 biology, a zygospore-producing plant. 



Zygopleural (zi-go-plu'- ral) [C,vyov, yoke; - 

 side]. In biology, bilaterally symmetric. Cf. Di- 

 pleural and Tetrapleural . 



Zygose (zi'-goz) \_Cvy6v, yoke]. In biology, pertaining 

 to or characteristic of zygosis. 



Zygosis (zi-go' -sis) [C,vyovv, to join, yoke]. In biology, | 

 the process of asexual reproduction by conjugation or j 

 fusion of two protoplasmic bodies or gametes. 



Zygosperm (zi'-go-spurm) \_^vy6v, yoke ; a~i 

 Same as Zygospore. 



Zygosphene (zi'-go-sfen) [Cvyov, yoke ; c<p>/r, \\ 

 In biology, a process on the anterior face of the n 

 arch of each vertebra of certain reptiles, interlocking ; 

 the vertebrae by fitting into a fossa (the zygewtrum 

 the posterior face of the preceding vertebra. 



Zygosporangium (zi-go-spo -ran'-je-um) [>;«i. 



cnopa, seed ; ayyeiov, vessel : pi., Zygosporangia]. In ; 

 biology, a sporangium resulting from zygosis a;. 

 ing rise to zygospores. 



Zygospore (zi'-go-spor) [Zvydv, yoke ; onopd , seed], J 

 biology, the spore resulting from the zygosis 

 gation of two protoplasmic bodies or gam< 



Zygosporophore (zi -go - spor'- o- for) [>;»r, yok< 

 arropd, seed; depeiv, to bear]. In biology, "■» ^ 

 shaped or conic section of a hypha adjoining a 

 ete-cell after its delimitation." 



Zygote (zi'-got) \f.vyovv, to yoke]. Same as . 



Zygozoospore (3/ -go - zo'- o - spor) [„>; 61; \ 1 ■ 

 animal; (jTtopd, seed]. In biology, a mot il 

 zygospore. 



