AOR- 



19 



APO- 



which carries pure blood from the 

 heait for distribution to various 

 parts of the body through arteries 

 and their branches (anat.). 



aortic (aor'tik) a. [Gk. aorte, the 

 great artery.] Pert, the aorta ; appl. 

 arch, hiatus, isthmus, septum, etc. 

 (anat.), regurgitation (phys.). 



apatetic (ap'atet'ik) a. [Gk. apatet- 

 ikos, fallacious.] Appl. misleading 

 coloration (zool.). 



aperispermic (apeYisper'mik) a. [Gk. 

 a, without ; peri, around ; sperma, 

 seed.] Appl. seeds without nutritive 

 tissue (dot.}. 



apetalous (apet'alib) a. [Gk. a, with- 

 out ; pe talon, petal.] Having no 

 petals (bot.). 



apex (a'pfiks) n. [L. apex, summit.] 

 The tip or summit, as of lungs, 

 heart, etc. (anat.). 



aphanipterous (af'anlp'terus) a. [Gk. 

 aphanes, unseen ; pteron, wing.] 

 Apparently without wings (zool.}. 



apheliotropism (af'ellot'ropizm) n. 

 [Gk. apo, away; helios, sun; trepein, 

 to turn.] Tendency to turn away 

 from light (biol.). 



aphodal (af 'odal) a. [Gk. apo, away ; 

 hodos, way or path.] Appl. a type 

 of canal system in sponges (zool.}. 



aphodus (af'ddus) n. [Gk. apo, away ; 

 hodos, path.] The short tube lead- 

 ing from the flagellate chamber to 

 the excurrent canal in one of the 

 types of canal systems in sponges 

 (zool.}. 



aphyllous Oftftfs) a. [Gk. a, with- 

 out ; phyllon, leaf.] Without foliage 

 leaves (bot.}. 



aphylly (afil'l) . [Gk. a, without ; 

 phyllon, leaf.] Suppression or 

 absence of leaves (bot.}. 



apical (ap'ikal) a. [L. apex, summit.] 

 At the tip or summit, appl. cell at 

 tip of a growing point (bot.} 

 appl. aboral plates of Echinoderms 

 (zool.}. 



apiculate (aptk'ulat) a. [L. apex, 

 summit.] Forming abruptly to a 

 small tip, as a leaf (bot.}. 



apilary (apilarl) a. [Gk. a, not ; 

 pilos, felt cap.] Having the upper 

 lip wanting or suppressed in the 

 corolla (bot.}. 



aplacental (ap'lasen'tal) a. [L. a, 

 not ; placenta, flat cake.] Not 



developing a placenta, as in Mono- 

 tremes (zool.). 



aplanogamete (aplan'ogamet') . 

 [Gk. a, not ; pianos, wandering ; 

 gamete, wife.] A non-motile con- 

 jugating germ cell in various plants 

 and animals (biol.). 



aplanospore (aplan'ospor) n. [Gk. a, 

 without ; pianos, wandering ; sporos, 

 seed.] A non-motile resting spore 

 of Algae for tiding over unfavourable 

 circumstances (bot.). 



aploperistomatous (ap'loper'lstom'- 

 atus) a. [Gk. aploos, single ; peri, 

 around ; stoma, mouth.] Having a 

 peristome with one row of teeth, as 

 mosses (bot.). 



aplostemonous (ap'lostem'onus) a. 

 [Gk. aploos, single ; stemon, a spun 

 thread.] Having a single row of 

 stamens (bot.). 



apneustic (apnu'stik) a. [Gk. a, 

 without ; pneustos, breath.] With 

 closed tracheal system ; appl. aqua- 

 tic larvae of certain insects (zool.). 



apocarpous (ap'okar'pus) a. [Gk. 

 apo, away ; karpos, fruit.] Having 

 separate or partially united carpels 

 (bot.). 



apocyte (ap'osit) n. [Gk. apo, away ; 

 kytos, hollow.] A multinucleate 

 cell, a plurinucleate mass of 

 protoplasm (cyt.). 



apodal (ap'odal) a. [Gk. a, without ; 

 pous, foot.] Having no feet (zool.). 



apodema (ap'ode'ma) n. [Gk. apo, 

 away ; demas, body.] An internal 

 projection usually of thoracic seg- 

 ments, for muscle attachments, 

 found in Arthropods (zool.). 



apodous (ap'odus), apodal. 



apogamy (apog'aml) n. [Gk. apo, 

 away ; gamos, marriage.] Develop- 

 ment without the intervention of 

 sexual organs (bot.). 



apogeotropic (ap'oje'otrSp'lk) a. [Gk. 

 apo, away ; gaia, earth ; trepein, to 

 turn.] Having the property of turn- 

 ing away from the earth (bot.). 



apogeotropism (ap'qjeot'ropizm) n. 

 [Gk. apo, away ; gtiia, earth ; tre- 

 Pein, to turn.] Tendency to act 

 apparently contrary to law of 

 gravity this is, to turn away from 

 the earth (biol.). 



aponeurosis (ap'b'nuro'sis) n. [Gk. 

 apo, from ; neuron, sinew ] The 



