DIS- 



80 



DOR- 



Crinoids, the secondary brachalia, 

 fixed or free (zool.). 



distichous (dis'tikus) a. [Gk. distiches, 

 with two rows.] Pert, alternate 

 leaves, so arranged that the first is 

 directly below the third (bot.). 



distractile (distrak'til) a. [L. fit's, 

 apart ; trahere, to draw.] Widely 

 separate ; appl. usually to long- 

 stalked anthers (dot.}. 



distribution (dis'tribu'shun) n. [L. 

 dis, apart ; tribuere, to allot.] The 

 range of an organism or group in 

 the biogeographical divisions of the 

 globe (Hoi.). 



dithecal (dithe'kal) a. [Gk. dis, twice ; 

 theke, box.] Two-celled (bot.). 



ditokous (dit'okus) a. [Gk. dis, twice ; 

 tokos, birth.] Producing two at a 

 time, either eggs or young (zool.). 



ditrematous (dltre'matus) a. [Gk. 

 dis, twice ; trema, opening.] With 

 separate genital openings ; with 

 anus and genital openings separate 

 (zool.). 



ditrochous (dlt'rokus) a. [Gk. dis, 

 twice ; trochos, runner.] With a 

 divided trochanter, or second joint 

 of the limb (zool.). 



diurnal (dlur'nal) a. [L. dies, day.] 

 Opening during the day only (bot.) ; 

 active in the day-time (zool.). 



divaricate (divar'ikat) a. [L. dis, 

 apart ; varicare, to straddle.] 

 Widely divergent ; bifid ; forked 

 (hot., zool.). 



divaricators (dl'varlka'torz) n. plu. 

 [L. dis, apart ; varicare, to straddle.] 

 Muscles stretching from the ventral 

 valve to the cardinal process, and 

 by their contraction opening the 

 shell (zool.). 



divergency (diver'jenst) n. [L. dis, 

 apart ; vergere, to bend.j The 

 fraction of a stem circumference, 

 usually constant for a species, which 

 separates two consecutive leaves in 

 a spiral (bot.). 



divergent (diver'jgnt) a. [L. dis, 

 apart ; vergere, to bend.] Separ- 

 ated from one another ; appl. leaves 

 (bot.). 



diverticulum (dl'vgrtlk'ulum) n. [L. 

 de, away ; -vertere, to turn.] A tube 

 or sac, blind at the distal end, 

 branching off from a canal or cavity 

 (zool.). 



divided (divl'ded) a. [L. dividere, to 

 divide.] With the lamina cut by 

 incisions which reach the midrib ; 

 appl. leaves (bot.). 



division (divlzh'un) n. [L. dividere, 

 to divide.] One of the smaller 

 groups of organisms which together 

 form a larger group (biol.) ; one of 

 the separate parts of which any 

 structure may be composed (biol.). 



dizoic (dlzo'ik) a. [Gk. dis, twice; 

 zoon, animal.] Pert, spore con- 

 taining two sporozoites (zool.). 



dodecagynous (do'dekaj'inus) a. [Gk. 

 dodeka, twelve ; gyne, woman.] 

 Having twelve pistils (bot.). 



dodecamerous (do'dekam'erus) a. 

 [Gk. dodeka, twelve ; meros, part.] 

 Having each whorl composed of 

 twelve parts (bot.). 



dodecandrous (do'dekan'drus) a. 

 [Gk. dodeka, twelve ; aner, man.] 

 Having at least twelve stamens 

 (bot.). 



dolabriform (dolab'riform) a. [L. 

 dolabra, mattock ; forma, shape.] 

 Axe-shaped (biol.). 



dolichostylous (dol'lkostl'lus) a. [Gk. 

 dolichos, long ; stylos, pillar.] Pert. 

 long-styled anthers in dimorphic 

 flowers (bot.). 



dolioform (do'lioform) a. [L. dolium, 

 jar ; forma, shape.] Shaped like 

 a barrel (zool.). 



dominant characters, see Men- 



dormant (dor'mant) a. [L. dormire, 

 to sleep.] Resting ; appl. any 

 structure or feature which may 

 develop later (Hoi.). 



dorsal (dor'sal) a. [L. dorsum, back.] 

 Pert, or lying near the back as 

 opp. the venlral surface (anat.) ; 

 pert, surface farthest from the 

 axis ; the upper surface of the 

 thallus or prothallus of ferns, etc. 

 (bot.). 



dorsalis (dorsa'lis) n. [L. dorsum, 

 back.] The artery which supplies 

 the back of any organ (anat.). 



dorsiferous (dorsif'erus) a. [L. 

 dorsum, back ; ferre, to carry.] 

 With the sori on the back of the 

 leaf (bot.) ; carrying the young on 

 the back (zool.). 



dorsifixed (dor'sifik'st) a. [L. dorsum, 

 back ; fingere^ to fix.] Having the 



