Osteosolereids 



OzyeeUnloset 



hard), the " bone- shaped " sclereids 

 of Hakea. 



os'tiolate, ostiola'tus {ostiolum, a little 

 door), furnished with an opening or 

 mouth ; Os'tiole, Os'tiolum^ (1) the 

 opening of the conceptacle in some 

 jOgae ; (2) the aperture through 

 which spores escape from the peri- 

 thecium ; (3) a pore or opening 

 in the prickles of Victoria regia 

 (Tr^cul). 



ostracodermat'inus {S<rrpaKov, a hard, 

 shell; Sepfidriyos, leathern), resem- 

 bling the shells of molluscs ; applied 

 to certain Lichens. 



-o'sus, a termination indicating aug- 

 mentation, as radio'btis, large- 

 rooted. 



Oued or Wed, Arabic terms for valleys 

 containing water in the rainy season, 



out'er, exterior, abaxial; '^ Glomes, 

 one or more glumes at the base of 

 a spikelet in grasses, enclosing one 

 or more flowers ; ^ Peridlum = 

 Peripium externum. 



Ou^'growth, (1) another name for 

 Emergence ; (2) a tuberous excre- 

 scence on roots. 



Out'line, the continuous boundary-line 

 of an organ, as of a leaf. 



o'val, ova' lis .{oncm, an egg), broadly 

 elliptic. 



Ovarioph'ylly (ic^p'oj/, asmallegg ; <pv\- 

 \ov, a leaf), descending metamorpho- 

 sis of a carpel into a leaf (Morren). 



O'vary, Ova' Hum [ovum, an ef'g), (1) 

 that part of the pistil which con- 

 tains the ovules, the immature fruif, 

 formerly termed the Germen; (2) 

 = Archegonium (H. Gibson). 



o'vate, ova'tus (Lat., egg-shaped), (1) 

 shaped like a longitudinal section 

 of a hen's egg, the broader end 

 basal ; (2) used for ovoid. 



Ovel'lum, Dunal's term for a young 

 carpel bearing the same relation 

 to a mature carpel as an ovule to a 

 seed. 



Ovench'yma {ovum, an egg; tyx^P-o-i 

 an infusion), loose tissue of oval- 

 shaped cells. 



overhanging, projecting beyond the 

 base. 



overlap'pine, suggested to denote 

 right or left, as right edge ^^ o« 

 sinistrorse {i.e. dextrorse seen in 

 front) ; left edge <- , = dextrorae 

 (t. e. sinistrorse viewed from the 

 front). 



overly'ing, a suggested rendering of 

 INC u ROUS (Potter). 



overtop'ping, the gradual assertion 

 of predominaittce of certain limbs of 

 a branch system over the others 

 (Potoni6). 



o'viform, ovifoinn'is {ovum, an egg ; 

 forma, shape), ovoid, egg-shaped ; 

 Ovocen'tmm {Kfvrpov, a sharp point), 

 a central mass of fine-grained proto- 

 plasm surrounding the nucleus in 

 the ^organism of Achlya (Trow) ; 

 o'void, ovoi'deibs (elSos, i-esemblancc), 

 an egg-shaped solid ; ovoi'dal, having 

 the outline of an egg ; ovnla'ris 

 (Mod. Lat.) = OVOID ; ov'ulate, 

 ovula'tus, (1) possessing ovules ; 



(2) somewhat ovoid (J. S. Henslow) ; 

 Ov'ule, Ov'ulum, the young seed in 

 the ovary, the organ which after 

 fertilization develops into a seed ; 

 '- Tube, a thread-like extension 

 of the amnios, rising beyond the 

 foramen ; ovulif erous {fero, I bear), 

 bearing ovules; adj. ov'nlar; O'vnm, 

 (1) the ovule; (2) = Zygote; 



(3) = OOSPHERK. 



oxBl'lc, pertaining to Oxalis, wood 

 sorrel •,. oxalida'ceous, referring to 

 the genus Oxalis, or its allies; --' 

 Ac'id, a vegetable acid of frequent 

 occurrence, abundant in Oxali* ; 

 oxalif 'erous {fero, I bear), pro- 

 duciug oxalic acid rr its salts; 

 OxalUeu'cite (-f Leucite), Van 

 Tieghem's name for a vacuole which 

 contains oxalic acid. 



Oxo'dad (o|ai5Tjs, sour), a plant ot 

 a humus marsh (Clements); 0x0- 

 di'on, an association on acid soil ; 

 Oxodi'um, a humus marsh formation 

 (Clements). 



oxyacan'thous, -thus {o^hs, sharp; 

 UKavda, a thorn), furnished with 

 •many thorns or prickles ; oxycar'- 

 pus (/capirbs, fruit), when fruit is 

 sharp-pointed ; Oxyoel'luloses + 



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