ZON 



447 



with small teeth from dens, a 

 tooth), in anat., the toothed belt: 

 zona glomerulosa, gldm-&r'iil-dz'd 

 (dim. from L. gl8m$rosus, like a 

 hall, round from gltimus, a ball), 

 the outer layer of the cortical 

 part of the supra-renal bodies : 

 z. pectinata, n., p^kf-tm-at'-d (L. 

 pecttndtus, combed from pectin, 

 a comb), the comb-like belt ; the 

 outer zone of the membrana 

 basilaris: z. -pellucido,, pZl-lds'id-a 

 (L. pellucidus, transparent), the 

 i external covering of the ovum ; 

 a thick, colourless, transparent 

 envelope which surrounds the 

 i substance of the yelk : z. reticul- 

 s aris, r%t-ik''Ul-dr'>is (L. reticuldr- 

 is, net-like from ret&, a net), the 

 inner layer of the cortical part of 

 the supra-renal bodies. 

 zonate, a., zon<dt (L. zona, a belt, 

 a girdle), in bot., marked with 

 concentric undulations, bands, or 

 zones. 



zooid, a., zo'oyd (Gr. zoo'n, an 

 animal ; eidos, resemblance), an 

 organism, more or less independ- 

 ent, produced by gemmation or 

 fission: zoology, n., zd-dl'-d-ji 

 (Gr. logos, a discourse), that 

 branch of natural history which 

 treats of the structure, habits, 

 classification, etc., of all animals. 

 zoophilous, a., zo-Sf-U-its (Gr. 

 zo6n, an animal ; phileo, I love), 

 in bot., applied to plants fertil- 

 ised by the agency of insects. 

 zoophyte, n., zd'of-U (Gr. zoon, an 

 animal; phuton, a plant), in zooL, 

 applied to many plant - like 

 animals, such as sponges, corals, 

 sea-anemones, etc. 

 zoosperms, n. plu., zd'o-spermz 

 (Gr. zoon, an animal ; sperma, 

 seed), in bot., the locomotive 

 spores of some Algae and Fungi ; 

 zoospores; in zooL, animal semen, 

 zoospores, n. plu., zd'o-sporz (Gr. 

 zoon, an animal ; spora, seed), 

 in bot., moving spores provided 

 with cilia ; zoosperms ; in zool., 

 the ciliated locomotive germs of 



some of the lowest forms of 

 plants the Protophyta. 



zootheca, n., zo'-d'thek-d (Gr. zoon, 

 an animal; theke, a case), in bot., 

 a cell containing a spermatozoid. 



zootomy, n., zo-dt'-dm-i (Gr. zoon, 

 an animal ; tome, a cutting), the 

 dissection of the lower animals. 



zygapophyses, n. plu., zig'-a-ptif- is- 

 es (Gr. zugon, a yoke; apdphusts, 

 the process of a bone), the yoke- 

 pieces ; the articulating processes 

 of the vertebrae. 



zygoma, n.,zig-om'-d (Gr. zugoma, 

 a bolt or bar from zugon, a 

 yoke), in anat., a bony arch at 

 the upper part of the side of 

 the face ; the arch formed by the 

 zygomatic process of the temporal 

 and cheek bones : zygomatic, a., 

 zig f 'dm'dt f 'ik, pert, to the zygoma, 

 or to the cheek-bone : zygomatic 

 fossa, ftis'-sd (L. fossa, a ditch), 

 an irregularly - shaped cavity, 

 situated below and on the inner 

 side of the zygoma : z. process, 

 a thin, narrow projection of bone 

 at the base of the squamous 

 portion of the temporal bone : 

 zygomaticus, a., zig'om-at'-ik-us, 

 applied to two muscles the 

 major, arising from the cheek- 

 bone, and inserted into the angle 

 of the mouth ; the minor, arising 

 higher on the cheek-bone, and 

 inserted into the upper lip. 



ZygophyllaceaB, n. plu., zig'-o-fil* 

 ld''8$'e{GT. zugon, a yoke; phullon, 

 a leaf, the leaves being in pairs), 

 the Guiacum family, an Order of 

 plants, some abound in stimulant 

 resin, some are bitter and acrid, 

 others are sudorifics : Zygophyl- 

 lese, n. plu., zig'-o-fiV-U-e, a sec- 

 tion or Sub-order, having album- 

 inous seeds : Zygophyllum, n. , 

 zig f '6'fil r -lum, a genus of plants : 

 Zygophyllum fabago, fdb-dg'o 

 (L. fdbdgtmis, of or pert, to beans 

 from fdba, a bean), the Bean- 

 caper, so named from its flowers 

 being used as capers, said to act 

 as a febrifuge. 



