ADS- 



rostrum, beak.] Near to or closely 

 connected with the beak or rostrum 

 (zool.). 



adsorption (iidsorp'shun) n. [L. ad, 

 to ; sorbere, to suck in.] The con- 

 centration of a substance in solution 

 in a liquid on a surface in contact 

 with the surface of another phase ; 

 the adhesion of molecules to solid 

 bodies (phys.). 



aduncate (adung'kat) a. [L. aduncus, 

 hooked.] Crooked ; bent in the 

 form of a hook. 



advehent (ad've'he'nt) a. [L. adve- 

 here, to carry to.] Appl. veins, 

 same as afferent (anat.). 



adventitious (advgntish'iis) a. [L. ad, 

 to ; venire, to come.] Accidental ; 

 appl. organs arising in abnormal 

 positions (hot.}. 



aecidiospores (esld'iosporz', as-) n. plu. 

 [L. aecidium, cup ; Gk. sporos, seed.] 

 The spores contained in an aeci- 

 dium or clustercup (bot.). 



aecidium (estd'ium, as-) n. [L. aeci- 

 dium, cup.] A cup-shaped structure 

 containing simple sporophores, 

 bearing rows of spores (bot.). 



aegithognathous (e'jlthog'nathus, a'- 

 glthogna'thus) a. [Gk. aegithos, 

 hedge - sparrow ; gnathos, jaw.] 

 With maxillo - palatines separate, 

 vomers forming a wedge in front 

 and diverging behind ; appl. a type 

 of palate found in the Carinatae 

 (zool.). 



aerial (ae'rtal) a. [L. aer, air.] In- 

 habiting the air ; appl. roots grow- 

 ing above ground, e.g. from stems 

 of ivy, for purposes of climbing ; 

 also to small bulbs appearing in 

 the axils of the leaves of certain 

 plants (bot.). 



aerobe (a'eYob) n. [Gk. aer, air ; 

 bios, life.] An organism which 

 grows only in the presence of 

 oxygen ; appl. bacteria. 



aerobic (a'erob'ik) a. [Gk. aer, air ; 

 bios, life.] Thriving only in abund- 

 ance of oxygen (bact.). 



aerocyst (a'grb'sTst) n. [Gk. aer, air ; 

 kystis, bladder.] An air vesicle 

 of Algae (bot.). 



aerophyte (a'6roflt) n. [Gk. aer, air ; 

 phyton, plant.] A land-plant grow- 

 ing attached to another plant ; an 

 epiphyte. 



aerostat (a'grostat) n. [L. aer, air ; 

 stare, to stand.] An air-sac in 

 insect body or in bird-bone (zool.). 



aerostatic (a'Srostat'ik), a. [L. aer, 

 air ; stare, to stand.] Pneumatic ; 

 containing air-spaces (zool.). 



aerotaxis (a'grotak'sls) . [Gk. aer, 

 air ; taxis, arrangement.] The 

 movement of bacteria and other 

 micro-organisms towards or away 

 from oxygen (phys.). 



aerotropism (aerot'ropizm) n. [Gk 

 aer, air ; trepein, to turn.] The 

 reaction of plants to gases (bot.). 



aesthacyte (es'thaslt) n. [Gk. ais- 

 thesis, sensation ; kytos, hollow.] 

 A sensory cell of primitive animals, 



aesthesia (gsthe'zla) n. [Gk. aisthesis, 

 sensation.] Sensibility. 



aestival (eVtlval, estl'val) a. [L. 

 aestas, summer.] Produced in, or 

 pert, summer. 



aestivation (eVtiva'shun) n. [L. aesti- 

 uus, pert, summer.] The mode in 

 which the different parts of the 

 flower are disposed in the flower- 

 bud ; praefloration ; torpor during 

 summer as in the case of some 

 animals. 



aethalium (etha'llum, ath-) n. [Gk. 

 aithahs, soot.] An aggregation of 

 plasmodia to form a compound fruit 

 in Mycetozoa. 



aetiology (etI61'6jl) n. [Gk. aitia, 

 cause ; logos, discourse.] A branch 

 of biology dealing with causes. 



afferent (af'erent) a. [L. afferre, to 

 bring.] Appl. nerves carrying im- 

 pulses to the nervous centres ; appl. 

 blood-vessels carrying blood to any 

 particular organ or set of organs 

 (anat.). 



affinity (afm'itl) n. [L. affinis, related 

 to.] Relationship ; similarity in all 

 essential organs (biol.). 



aflagellar (a'flajgl'ar) a. [Gr. a, 

 without ; L. flagelluni, a whip.] 

 Without a flagellum, a whip-like 

 appendage in certain unicellular 

 organisms ; appl. the end of a 

 trypanosome not furnished with a 

 flagellum (zool.}. 



afterbirth (af'terberth) n. [A.S. 

 aefter, behind ; beran, to bring 

 forth.] Placenta and foetal mem- 

 branes expelled after the young is 

 born (anal!.). 



