Mericarp 



Meiendozoa 



of a fruit which splits away as 

 a perfect fruit ; as the two carpels 

 in Umbelliferae ; mericy'clic {kvkKos, 

 a circle)^ occupying a part only of 

 the diameter, as spirally-arranged 

 leaves (OelakovskJ^). 



meridia'nus (Lat., belonging to noon), 

 at mid-day or noon ; towards the | 

 south (in northern latitudes) ; j 

 meridian, applied by 0. Mueller ] 

 to the plane in Diatoms which 

 contains the pervalvar axis. 



Herldisk i/iepos, a part; StV /cos, a disc), 

 term proposed by Clos for any pro- 

 cess upon the receptacle apart from 

 the floral organs, whetlier glandular 

 or not (Crozier) ; Mer'iphyte {((>vrhv, 

 a plant), employed by Lignier for 

 the vascular tissue of the leaf ; 

 Mer'iplast {irKaarhs, moulded), a 

 protoplast in a polyplast which 

 remains distinct, and does not fuse 

 with its fellows (Pirotta) ; Merlsm, 

 (1) Bateson's term for the repeti- 

 tion of parts to form a symmetry 

 or pattern ; (2) division of cells, 

 cellular structures-, or dichotomous 

 division of organs (Massart) ; 

 merismat'ic (uepia-fxa, a share), divid- 

 ing into parts or similar portions ; 

 '-' Tis'sue, formative tissue, cf. 

 Meristem. 



meris^moid (eI5os, resemblance), hav- 

 ing a likeness to the fungus-genus 

 Merisma. 



Mer'ispore {fxepos, a part; o-wopo, seed), 

 the segment of a sporidesm ; Meri- 

 spor'ocyst {kixttis, a bag), the 

 simple or branched Sporocyst of 

 Cephalideae, considered as a depar- 

 ture from the type of fructification 

 of the Mucoraceae (Vuillemin) ; 

 Mer'istele (ffri^Arj, a pillar), a portion 

 of the stele of a monostelic stem 

 received by each leaf ; restricted by 

 Brebner, by excluding Actinostele 

 and Haplostele from it ; further 

 particularized into Di-, EU-, haplo-, 



MONO-, TETP.A-, TUI-MERISTELIC 



types ; merist'ic Varia'tion, see 

 Merism. 

 Mer'istem {^i^piarhs, divisible), nas- 

 cent tissue, capable of being trans- 



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formed into special forms, as cam- 

 bium, etc. ; Pri'mary '^, forms the 

 whole tissue of very young organs ; 

 Sec'ondary ^, occurs in organs 

 along with permanent tissue, usually 

 in thin layers ; meristemat'ic, 

 pertaining to the Meristem; meri- 

 stogenet'ic {yivir-ns, a begetter), 

 produced by Meristem, actively 

 dividing cell-tissue. 



Mer'ithal, Merithal'lus (n-^pos, a part ; 

 0a\\h<i, a young shoot), an inter- 

 node ; meroblas'tic {^Aaa-rhs, a bud) 

 Embryog'eny, when only a part of 

 the spore is concerned, cf. holo- 

 ELASTIC ; Meroconid'mm, pi. Mero- 

 conid'ia (+ Conidium), conidia 

 which arise from the simultaneous 

 septation of a- hypha in Zygomy- 

 cetes, and mature together, while 

 ACROCONIDIA mature in succession 

 from the apex (A. Fisher) ; Merog'- 

 amy {ydfios, marriage), reduced 

 autophagy, which does not require 

 the participation of the whole of a 

 ^econd gamete, but only its cyto- 

 plasm or nucleus (Dangeard); Merog'- 

 ony iyov^, ofispring), fertilization 

 of the oogonia of Cysioseira, with- 

 out nuclei (Winkler) ; Meroplank'ton 

 (-{- Plankton), that found only at 

 certain seasons of the year (Forel) ; 

 adj. meroplankton'ic. 



meros- as a prefix, and its forms 

 -merous, -merus, as suffixes, denote 

 parts or numbers, as dimerous, etc. 



Mer'otype (iJ.epos, part ; rinros, a type), 

 a specimen collected from the original 

 type in cultivation, by means of 

 vegetative reproduction (Swingle) ; 

 syn'chronoQs -^j taken at the same 

 time as the original (Swingle). 



Mes'ad {fieaos, in the middle), a meso- 

 phyte (Clements) ;mes'arch (apx^?, be- 

 ginning), applied by Solms-Laubach 

 to those bundles in which the pro- 

 toxylem lies in the interior of the 

 primary strand of the wood, thus 

 partly centripetal and partly centri- 

 fugal ; mesendobiot'ic {tvSov, within ; 

 $ios, life), applied to a mesosapro- 

 phyte, as Pythium, etc. ; Mesendozo'a 

 iC^ov, an animal), animals resemb- 



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