AFI- 



8 



ALA 



aftershaft (af'tershaft) . [A.S. 

 aefter, behind ; shaft.] A small 

 tuft of down in the neighbourhood 

 of the superior umbilicus in the 

 feathers of most birds ; in certain 

 birds (e.g. moas, emu, cassowary) 

 a second vane, which, usually 

 shorter, but sometimes of equal 

 length to the vane proper, arises 

 near the superior umbilicus (zool.}. 



agametes (ag'amets) n. plu. [Gk. a, 

 without ; games, marriage.] Amoe- 

 bulae which develop directly into 

 adults without syngamy (zool.}. 



agamic (agam'lk) a. [Gk. a, without ; 

 games, marriage.] Asexual ; appl. 

 to a parthenogenic race (biol.} ; 

 cryptogamic (bot.}. 



agamobium (ag'amS'bium) n. [Gk. 

 a, without ; games, marriage ; bios, 

 life.] The asexual stage in meta- 

 genesis (zool.} ; the sporophyte 

 (bot.}. 



agamogenesis (ag'amqje'n'e'sis) n. [Gk. 

 a, without ; games, marriage ; 

 genesis, generation.] Partheno- 

 genesis. 



agamogenetic (ag'amojSngt'ik) a. 

 [Gk. a, without ; games, marriage ; 

 genesis, birth.] Appl. asexual re- 

 production. 



aganiogony (ag'amog'oni) n. [Gk. a, 

 without ; games, marriage ; genes, 

 offspring.] Schizogony, or repro- 

 duction without sexual process 

 (biol.}. 



agamont (ag'amont) n. [Gk. a, with- 

 out ; games, marriage ; on, being.] 

 A schizont, or that stage which 

 gives rise to agametes (biol.}. 



agamous (ag'amus) a. See agamic. 



agglomerate (agl8m'6rat) a. [L. ad, 

 to ; glomus, ball.] Clustered, as a 

 head of flowers. 



agglutination (aglootina'shun) . [L. 

 ad, to ; glutinare, to glue.] The 

 forming of clumps or floccules by 

 bacteria distributed in a medium, 

 and their simultaneous loss of 

 mobility (bact.}. 



agglutinin (agloot'inm) n. [L, ad, 

 to ; glutinare, to glue.] A sub- 

 stance which is supposed to cause 

 agglutination (phys.}. 



aggregate (ag'rggat) a. [L. ad, to ; 

 gregare, to collect into a flock.] 

 Formed in a cluster (bot., zool.}. 



aggregate fruit, a fruit formed 

 from the apocarpous gynoecium 

 of a single flower, as the raspberry. 



aggregation (agrgga'shun) n. [L. ad, 

 to ; gregare, to collect.] The 

 peculiar movement of the proto- 

 plasm in the cells of the tentacles 

 or tendrils of sensitive plants, which 

 being due to previous contact, causes 

 the tentacle or tendril to bend 

 towards the point where the stimu- 

 lus was applied (phys.}. 



aggressin (agres'm) n. [L. aggressus, 

 attacked.] A toxic substance pro- 

 duced by pathogenic organisms 

 inhibiting the defensive reactions 

 of the host (phys.}. 



aglossate (aglos'-at) n. [Gk. a, with- 

 out ; glossa, tongue.] Having no 

 tongue (zool.}. 



agnathostomatous (agnath'ostonY- 

 atus) a. [Gk. a, without ; gnathos, 

 jaw ; stoma, mouth.] Having the 

 mouth unfurnished with jaws, as in 

 the lamprey (zool.}. 



agnathous (agnath'us) a. [Gk. a, 

 without ; gnathos, jaw.] Having 

 no jaw (zool.}. 



agrostology (ag'rostol'ojl) n. [Gk. 

 agrostis, grass ; logos, discourse.] 

 That part of botany dealing with 

 the systematic treatment of grasses 

 (bot.}. 



air-bladder (ar'-blad'er) n. [L. aer, 

 air; A.S. bleedre, bladder.] The 

 swim-bladder, an air-sac formed by 

 an outgrowth from the alimentary 

 canal in many fishes (zool.}. 



air-cells, thin-walled cavities in the 

 ethmoidal labyrinth ; numerous 

 cavities in the mastoid (anat.}. 



air-sacs, spaces filled with air and 

 connected with the lungs, which 

 increase the respiratory coefficient, 

 and probably lessen the specific 

 gravity in birds. 



akaryote (aka/iot) n. [Gk. a, without ; 

 karyon, nut, nucleus.] A cell in 

 which the nucleoplasm has not 

 collected together to form a nu- 

 cleus ; a non-nucleated cell (cyt.}. 



akinete (^'kinet', aVinet) n. [Gk. a, 

 not ; kinein, to move.] A resting 

 cell in certain green Algae, which 

 will later reproduce (bot?). 



ala (a'la) n. [L. ala, wing.] Any 

 winglike projection, e.g. of vomer 



