GLOSSARY. 



541 



Dias'tasis, ) n. A separation of bones, par- 



Dias'tema, \ ticularly the cranial ones, or of 

 teeth, from each other. 



Dias'tole, n. Dilatation of the heart, alter- 

 nating with the systole or contraction, occa- 

 sioning pulsation. 



Dichot'omous, a. Divided into pairs. 



Dichromatic, a. Of two colors, as the "red" 

 and "gray" plumages of Scops asio. 



Didac'tylous, a. .Two-toed, as the ostrich. 



Digas'tric, a. Douhle-bellicd ; name of a 

 certain muscle. 



Digit'igrade, a. Walking on the toes. Op- 

 posed to plantigrade. 



Digitus, «.; pi. cligiti. Digit. Finger or toe. 

 (11(3 ) 



Dimorphic, a. Of two forms. 



DiPLO'ii, n. Light spongy network of bone be- 

 tween inner and outer surface of the skull. 



Disc or Disk, n. Set of radiating feathers of 

 peculiar shape or texture around the eye of 

 owls. 



Dissepimen'tum Nar'ium, 11. Same as sep- 

 tum narium, which see. 



Dis'tad, a. Toward an extremity. 



Dis'tal, a. Remote ; situate at or near an ex- 

 tremity ; opposed to proximal. 



Dis'tichous, a. Two-rowed ; s[)read apart on 

 either side of a middle line, as the hairs of a 

 squirrel's tail, or the tail-feathers of the Ar- 

 clueopteryx. 



Ditok'ous, a. Producing but two eggs, as the 

 pigeon and humming-bird. 



Diuii'nal, a. Pertaining to the daytime. 



Divar'icate, a. Branching otf ; spreading 

 apart ; curving away. 



DiVERTic'uLUM, u. An offshoot of the small 

 intestine. 



Dor'sad, a. Toward the back. Opposite of 

 veivtrad. 



Dor'sal, a. Pertaining to the back. 



Dor'sum, 11. Back ; upper surface of trunk 

 from neck to rump. (57.) 



Down, n. Small .soft feathers of plumulaceous 

 structure, generally growing about the roots 

 of plumcp, and concealed by them. See 



PLUMULiE. 



Down'y, a. Of plumulaceous structure. A 

 part of the plumage is of down-feathers, and 

 the bases of the contour feathers usually also 

 are of downy structure. 



Duct, a. Any tube for conveyance of an ani- 

 mal product ; as oviduct, s\)eYm-duct, lachry- 

 mal dud. 



Duod'enal, a. Pertaining to the duodenum. 



Duod'enum, 11. A short portion of the njjper 

 intestine next to the gizzard, receiving the 

 pancreatic and hepatic secretions. 



Du'ra Ma'ter, 11. Outer membranous invest- 

 ment of the brain. 



Dusk'y, a. Of any undefined dark color. 



E. 



Eared, a. Having lengthened or highly col- 

 ored auricular or other feathers on the side of 

 the head. Eared grebe ; \on^-earcd owl. 



Ec'dysis, 11. Moult ; the shedding and renewal 

 of plumage. 



Econ'omy (also wiitten (economy), n. Physical 

 or physiological disposition. (Literally, regu- 

 lation of a household.) 



Ecto- {ill composition). Outer. 



EcTOZO'ON, n. External parasite, as a louse ; 

 same as epizoon. Opposed to entozoon. 



Eden'tate, I a. Toothless, as nearly all 



Eden'tulous, \ birds are. 



Edge of Wing. (95.) See Campterium. 



Ef'fekent, a. Conveying outward or away ; 

 opposed to ccffercnt. 



El'ement, 11. A simple ultimate constituent 

 part of a com])ouiul organ. The centrum is 

 an element of a vertebra. 



El'evated, a. Said of the hind toe when in- 

 serted above the level of the others. 



Elon'gate, «. Lengthened beyond usmd ratio. 



Emar'uinate, a.. Notched at the end ; slightly 

 forked, especially in case of a tail so shaped ; 

 also notched, or abruptly narrowed along the 

 edge, in its continuity, as the border of many 

 a wing-([uill. 



Embonpoint, n. State of perfect health, as in- 

 dicated by condition of fatness not amounting 

 to corpulence or obesity. 



Em'bryo, 11. Fecundated germ or rudiment of 

 an animal ; said of a bird until hatched, and 

 therefore corresponding to fmtus in maiumal- 



og.y. 



Embryol'ogy, 11. Science or study of the de- 

 velopment of animals before birth or hatching. 



Embryon'ic, a. Pertaining to an embryo ; be- 

 ing an emlDryo ; not yet hatched. 



Enam'el, n. The hard white substance cover- 

 ing the teeth. 



Enarthro'sis, n. Ball-and-socket joint. 



Enceph'alon, 11. Contents of the cranium, 

 especially the brain. 



Endocar'dium, 71. Lining membrane of the 

 heart. 



Endog'enous, a. Of internal growth or forma- 

 tion ; interstitially deposited. Compare au- 

 fogcnous. Opposed to exogenous. 



Exdoskel'eton, 11. The .skeleton proper, or 

 skeleton as commonly understood ; the inner 

 bony framework of the body. (Used in dis- 

 tinction from exoskelcton or dermoskeleton, 

 .such as some animals possess.) 



Enter'ic, a. Be! 

 testines ; intestinal. 



Ento- (in composition). Inner. 



Epenceph'alon, 11. Hindmost segment of the 

 brain. 



Epi- {in composition). On ; upon ; over. Op- 

 posed to hypo-. 



Epider'.mis, /t. Cuticle or scarf-skin. 



Epidid'ymis, 11. An associate organ of the tes- 

 tis, in' birds apparently a remnant of the pri- 

 mordial kidney. 



Epigas'trii'm, '/(. Pit of stomach ; upper belly, 

 next to breast. (A region not well distin- 

 guished in birds. The teim is scarcely used.) 

 (64.) 



Epiglot'tis, n. Gristly flap on top of wind- 

 pipe, rudimentary or wanting in birds. 



Epignath'ous, a. Hook-billed. 



Epiot'ic, a. for n. A certain element of the 

 auditory capsule. 



Epiph'ysis, n. Gristly cap on the end of a 

 bone, afterward becoming bony and united. 



lonj^ing or relating to the in- 



