

MERI^EUM 



747 



MERYCOLOGY 



7S 



:i 



Meriaeum {mer-e-e' '-urn) \jiepoc, the thigh : //., Merited], 

 In biology, the anterior surface of the socket of the 

 hind-leg of a beetle. 



Meric (mer'-ik) [pipoc, part]. Relating to a part. 



Mericarp {mer'-ik-arp) \jiipoc, a part; /caprroc, fruit]. 

 In biology, one of the ripened carpels of a schizocarp; 

 a portion of a fruit separating from the rest. 



Mericism {mer'-is-izm). Same as Merycisnu 



Meride {mer' -id) [/xipoc, part; ue'ipo/iai, to share]. In 

 biology, a colony of cells that either remains isolated 

 or multiplies by gemmation to form a larger aggre- 

 gate. 



Meridian {tner-id' -e-an) [meridies, midday]. An im- 

 aginary great circle surrounding any globe and inter- 

 secting the poles. M. of the Eye, an imaginary cir- 

 cle surrounding the globe of the eye, vertical if 

 supposed to be perpendicular, or horizontal if level. A 

 lens is also described in the same way- 



Meridional {mer-id'-e-on-al) \_meridies, midday]. Re- 

 lating to a meridian. 



Meridrosis {mer-id-ro'-sis) [uepog, part ; Mpwc, sweat]. 

 Local perspiration. 



Meris {trier' -is) [fiepic, a part: //., AIerides\ In biol- 

 ogy, a cell-colony either permanently isolated, or by 

 budding giving rise to a higher aggregate, the denie. 



Merismatic \mer-is-mat' -ik) \jiipiap.a, a part ; fiepiauog, 

 a division ; pepi^eiv, to divide]. In biology, charac- 

 terized by the formation of internal septa. 



Merismopedia {mer-is-mo-pe' '-de-a/i) [fiepiofidg, divi- 

 sion ; Tra/c, child]. A bacterium multiplying by two 

 rectangular divisions, thus forming a tablet-like group 

 of four cells in one plane. See Bacteria, Table of. 



Merispore [mer'-is-por) \p.ipoc, part ; a~ opoc, seed]. 

 The spores resulting from division of the endospore 

 or exospore of fungi ; one of the secondary spores of 

 a compound spore. 



Meristem {mer' -is -tern) [fiepicroc, verbal adj. of 

 uepueiv, to divide]. In biology, the actively growing, 

 undifferentiated cell-tissue of the growing tips of 

 plants ; the formative tissue of the cambium layer. 



Meristematic {mer-is-tem-at'-ik). Synonym of Mer- 

 ismatic. 



eristogenetic {mer-is-to-jen-ef -ik) \uepusr6c, divided ; 

 Miar, to beget]. Developed from meristem. 

 erit {mer' -it) [uEp!g,a. part {uepirrjc, a partaker)]. In 

 biology, one of the small bodies or granules contain- 

 ing one or two chromatin-specks, or microsomata, 

 formed by the breaking up of the male and female 

 pronuclei in the process of impregnation. The Sper- 

 matomeriten and Ovomeriten of Boehm. Cf. Idant. 



Merithal {mer' -ith-al) \jiepic, part; QaMAc, a branch]. 

 Same as Internode. 



Merizotropia {tner-iz-o-tro> '-pe-ah). See Merotropia. 



Merkel's Cells. The tactile corpuscles. M.'s Gang- 

 lia, small groups of subepidermic ganglion-cells ; the 

 tactile corpuscles. M.'s Muscle. See Muscles, 

 Table of. M.'s Plane. See Plane. M.'s Solu- 

 tion, a fixing-agent used in histologic research. It 

 is composed of equal parts of a one-fourth per cent, 

 solution of platinum chlorid, and a one-fourth per 

 cent, solution of chromic acid. The specimen is 

 placed in this fluid for from two to three hours, and 

 then preserved in alcohol. M., Tactile Cells of. 

 See Grandr/s Corpuscles. M.'s Touch-corpuscles. 

 See Grandr/s Corpuscles. 



Meroblast {mer> '-o-blasf) [uipoc, a part ; Pxiardg, a 

 germ]. In embryology, an ovum that contains beside 

 the formative protoplasm or yolk, more or less food- 

 yolk or nutritive protoplasm. 



Meroblastic {mer-o-blas' -tik) [}ikpoc, a part ; pMordc, 

 a germ]. In embryology, a term applied to such 

 ova as present some impediment to the segmentation 



of the protoplasm of the vegetative pole, owing to 

 which this process is more or less confined to one por- 

 tion of the ovum, the protoplasm of the animal pole. 

 The distinction between meroblastic and holoblastic is 

 one of degree, not of kind. " The best known ex- 

 ample of a vertebrate meroblastic ovum is undoubtedlv 

 the hen's egg." (Minot.) 



Merocele {mer'-o-sel) \ji7jp6g, thigh ; ktj/.t], hernia]. 

 Femoral hernia. 



Merocerite {mer- os'-er-it) [nypoc, thigh ; nepac, horn]. 

 In biology, that joint of the antenna of a crustacean 

 which is borne upon the ischiocerite. 



Merocoxalgia {mer-o-koks-al'-je-ah) \_firjp6c, thigh; 

 coxa, hip ; a'/.yog, pain]. Pain affecting the thigh and 

 hip. 



Merocyte {mer'-o-sit) [pepoc, a part; kvtoc, a cell]. In 

 biology, one of the eight nucleated masses of proto- 

 plasm of the meroblastic, mesolecithal, or telolecithal 

 germ. (Lang.) 



Merodialysis {mer-o-di-al' -is-is) [utpoe, part; did/.ivig, 

 separation]. Partial decomposition. 



Merogastrula (rner-o-gas' -tru-lah) [uepoc, a part ; 

 yaari/p, belly: //. , Merogastrulcp]. In biology, the 

 gastrula of a meroblastic ovum. 



Merogenesis {mer-o-jen' -es-is) \ukpog, part ; yevecic, 

 genesis]. Segmentation; the origination of segments. 



Merognathite {mer-og' -nath-it) [fiepoc, a part ; yvadoc, 

 jaw]. In biology, the fourth joint of one of the gna- 

 thites or jaw-feet of a crustacean. (Milne- Edwards. ) 



Meroistic {mer-o-is'-tik) [//£poc, apart; <Jov, egg]. In 

 biology, applied to the ovaries of certain insects (e. g. , 

 aphis) that give rise not only to ova and ovicapsular 

 epithelium, but also to large vitelligenous cells. The 

 latter are connected with the ova and supply nutritive 

 material. Cf. Panoistic. 



Merology {mer-ol' -o-je) \jikpoc, share; 76yog, science]. 

 General anatomy ; the science of elementary tissues. 



Meropia {mer-c/ -pe-ah) [uipoc, part ; dti/', sight]. Partial 

 blindness; obscuration of vision. 



Meroplanktonic {mer-o-plank-ton'-ik). See Plankton. 



Meropodite {mer-op / -o-dit) [uypoq, thigh; -off, foot]. 

 In biology, the fourth joint of a developed endopodite ; 

 the inner of the two main divisions of the typical 

 limb. (Milne-Edwards.) 



Merorrheuma {mer-o-ru' '-mah) \ukpoq, part ; pel/ia, 

 rheum]. Partial rheumatism. 



Merorrhexis {mer-or-eks'-is). Synonym of Merocele. 



Meros (me / -ros), Merus {nte'-rus) [urjpoc, thigh]. In 

 biology, the thigh ; the proximal segment of the lower 

 or posterior limb. The fourth joint of any crustacean 

 appendage, as the merognathite or meropodite. 



Merosome {mer'-o-som) \_uipoc, part ; aufia, body]. In 

 biology, one of the serial parts of a segmented organ- 

 ism ; a somite or metamere. 



Merotopia {mer-o-to' -pe-ah) [yepog, part ; t6-oq, place]. 

 Replacement of a part. 



Merotrope {mer'-o-trop), Merotropia (mer-o-tro / -pe-ah) 

 [uepoc, part; zp6r:oq, a turning]. Synthesis of sim- 

 pler bodies that have resulted from more complex 

 compounds which did not combine directly. 



Merotropia {mer-o-tro' -pe-ah) \jirip6q, thigh ; rp&noc, a 

 turning]. Reduction of a dislocation of the femur. 



Merry-thought {mer' -e-thmvf) . See Furcula and 

 Wish-bone. 



Mery's Glands. See Gland. 



Merycism {mer' -is-izm) [/ut/pvKioiioc, rumination]. Re- 

 gurgitation and rechewing of food. Rumination ; a 

 phenomenon characteristic of an extremely homo- 

 geneous group of Mammalia, i. e., the Pecora, or true 

 ruminants, and sometimes observed in man. 



Merycology {mer-ik-ol'-o-je) \uepvKiZ,eiv , to ruminate ; 

 /.o}oc, science]. The study of rumination. 



