isabellinus 



isostomous 



isabelli'nus (Mod. Lat. ), Isabella 

 colour, a dirty tawny tint. 



isadelph'ous, -us (la-os, equal to ; 

 d5eX</>6s, a brother), equal brother- 

 hood, the number of the stamens 

 in the two phalanges being equal. 



I'satin, the colouring principle of 

 woad, Isatis tinctoria, Linn. 



isid'ioid, resembling the Lichen 

 genus, Isidimn isidiif'erous (fero, 

 I bear), bearing a thallus like the 

 genus whence it derives its name ; 

 isid'iose, having powdery, coral- 

 like excrescences. 



Isid'ium (t'<r(s = a genus of corals; etSos, 

 like), the coral-like elevation of a 

 Lichen thallus with a globule on it. 



I'slands, a term applied to isolated 

 strands of phloem in the xylem. 



isobilat'eral (i'cros, equal to, bis, twice; 

 lotus, fateris, a side), capable of 

 being divided into two similar 

 halves ; isob'rious (/Sptdu;, I 

 strengthen), of equal strength, refer- 

 ring to the embryo of Dicotyledons ; 

 isobria'tus, dicotyledonary ; iso- 

 cho'mous (^cD/zd, a mound), applied 

 to branches springing from the same 

 stem at the same angle ; isoch'ro- 

 mous (x/>w,ua, colour), all of one 

 colour or hue, uniform in tint ; 

 isocy'clic (KUK\OS, a circle), eucyclic, 

 a flower having isomerous whorls ; 

 isodiamet'ric (cud, through ; fj.tr pov, 

 a measure), of equal dimensions ;<~ 

 Cells, those having an equal dia- 

 meter in each direction ; Isodi'ody 

 (SLodos, a passage), the condition of 

 producing DIODES which give rise 

 to unisexual prothallia (Van 

 Tieghem) ; isody'namous (Svvafus, 

 power), equally developed ; Iso- 

 gam'ete (ya/j-^rri^, a spouse), gametes 

 or sexiial cells of similar size and 

 appearance, which conjugate and 

 result in a zygote ; isog'amous 

 (yd/j.os, marriage), used for those 

 plants which produce isogametes ; 

 Isog'amy, the fusion of similar 

 sexual cells ; isog'enous (ytvos, race) 

 Induc'tion, used by Noll to express 

 sensitive movements arising from a 

 single cause ; isog'ynous (ywij, a 



woman), having the pistils similar ; 

 isogy'rus J (yvpos, round), forming a 

 complete spire ; Isomalt'ose ( + 

 MALTOSE), a product of amylodex- 

 trin, passing by fermentation into 

 maltose ; isomer'ic, isom'erous, -us 

 (yue'pos, a part), (1) having the same 

 elements in the same proportions, 

 but with different properties ; (2) 

 having members of successive cycles 

 equal in number, as the petals and 

 sepals ; isoph'agous (<f)dyw, I eat), 

 applied to Fungi which attack 

 one, or several allied species (Eriks- 

 son) ; isoph'orous (0ope'w, I carry) 

 transformable into something else 

 (Crozier); Isoplan'ogametes (irXdvos, 

 wandering, + GAMETE), motile 

 sexual cells of equal size, occurring 

 in Algae ; isopo'lar (polus, a pole), 

 an axis of Diatom frustules is so 

 termed when its extremities are 

 similar (0. Mueller) ; Isopro'thally 

 ( + PKOTHALLUS), producing pro- 

 thallia which are similar in sexual 

 character (Van Tieghem) ; i'soschist 

 (crx7Tos, split), applied to a cell of a 

 brood, all of which are equal in 

 size and function (Hartog) ; isos- 

 mot'ic (cixrjuos, impulse, pushing), 

 passing by osmosis in or out with 

 equal facility ; I'sospore (cnropa, 

 seed), a spore produced by one of 

 the Isospo'reae, plants having one 

 kind of spore, as in Ferns, opposed 

 to heterosporous ; isos'porous, 

 homosporous, or having one kind 

 of spore only ; Isosp'ory, the state 

 of producing one sort of spore ; 

 isoste'monous, nns, having as many 

 stamens as petals, or sepals ; Isos- 

 te'mony, equality in number of 

 stamens with the segments of the 

 perianth whorls ; isosty'lous ( + 

 STYLUS), the styles being similar, 

 opposed to heterostylous ; isos'tic, 

 Van Tieghem's term when the 

 mother root has more than two 

 xylem bundles ; isoton'ic (rbvos, a 

 strand, a brace) Concentra'tion, 

 that degree of different solutions in 

 which they attract water with equal 

 force (De Vries) ; isos'tomous ( 



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