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'ttlous, a. Two-toed, as the ostrich. 



Digas'teic, a. Double-bellied ; name of a 

 certain muscle. 



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

 posed to planligrmlc. 



Digitu.s, h.; pi. digiti. Digit. Finger or toe. 

 (116.) 



Di.MORpiiic, «. Of two forms. 



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

 tween inner and outer surface of the skull. 



Disc or Disk, ». Set of radiating feathers of 

 peculiar shape or texture around the eye of 

 owls. 



Dissepimen'tum Nak'ium, n. Same as sep- 

 tum narium, which see. 



Dis'tad, a. Toward an extremity. 



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

 tremity ; ojiposed to jn-o.rimal. 



Dls'iicHors, fi. Two-rowed ; spread apart on 

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

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

 rfuropteryx. 



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

 pigeon and lunnuiing-bird. 



Diur'n.il, a. Pertaining to the daytime. 



Div.iR'iCATE, a. Branching off ; spreading 

 apart ; curving away. 



DivEETic'uLUJi, n. An offshoot of the small 

 intestine. 



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

 ventrad. 



Dor'sal, a. Pertaining to the back. 



DoR'suit, n. Back ; upper surface of tnmk 

 from neck to rump. (57.) 



Down, n. Small soft feathers of plumulaceous 

 structure, generally growing about the roots 

 of phimcr, 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 convey.ince of an ani- 

 mal product ; as oviduct., sperm-rf(«:<, lachry- 

 mal duct. 



Duod'enal, a. Pertaining to the duodenum. 



Duod'exum, n. A short portion of the upper 

 intestine next to the gizzard, receiving the 

 pancreatic and hepatic secretions. 



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

 ment of the brain. 



Dusk't, a. Of any undefined dark color. 



K 



Eared, a. Having lengthened or highly col- 

 ored auricular or other feathers on the side of 

 the head. Eared grebe ; \onf!,-eared owl. 



Ec'DTSis, n. Moult ; the shedding and renewal 

 of plumage. 



Econ'omy (also written fKcoiwmy), n. Physical 

 or physiological disposition. (Literally, regu- 

 lation of a household.) 



EcTO- (Ml composition). Outer. 



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

 same as epizoon. Opposed to aUo:odn. 



Edex'tate, ( a. Tootliless, as nearly all 



Eden'tuloits, ( birds are. 



Edge OF Wing. (95.) See Campterium. 



Ef'ferent, a. Conveying outward or away ; 

 opposed to afferent. 



El'ement, ». A simple ultimate constituent 

 part of a compound organ. The centrum is 

 an element of a vertebra. 



El'evated, n. Said of the liind toe when in- 

 .serted above the level of the otliers. 



Ei.on'g.\te, a. Lengthened beyond usual ratio. 



Em.\R'gixate, ". Notched at the end ; slightly 

 forked, especially in case of a tail so shaped ; 

 also notched, or abru])tly narrowed along the 

 edge, in its continuity, as the border of many 

 a wing-quill. 



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

 dicated by condition of fatness not amounting 

 to corpulence or obesity. 



Em'bryo, n. Fecundated germ or rudiment of 

 an animal ; said of a bird until hatched, and 

 tlierefore corresponding to fmtus in mammal- 

 ogy- 



Embryoi/ogy, n. Science or study of the de- 

 velopment of animals before birth or hatching. 



Emrryon'ic, re. Pertaining to an embryo; be- 

 ing an embryo ; not yet hatched. 



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

 ing the teeth. 



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



Enceph'alon, 71.. Contents of the cranium, 

 especially the brain. 



Endocar'dium, )!. Lining membrane of the 

 heart. 



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

 tion ; interstitially deposited. Compare au- 

 togenous. Opposed to exogenous. 



Endoskel'eton, n. The skeleton proper, or 

 skeleton as conimoidy understood ; the inner 

 bony framework of the body. (Used in dis- 

 tinction from cxoskeleton or derm^oskelctmi, 

 such as some animals possess.) 



Enter'ic, a. Belonging or relating to the in- 

 testines ; intestinal. 



Ento- (in composition). Inner. 



Epenceph'alon, n. Hindmost segment of the 

 brain. 



Epi- (in com.posUioii). On ; upon ; over. Op- 

 posed to hypo-. 



Epider'mis, n. Cuticle or scarf-skin. 



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

 tis, in birds apparently a remnant of the pri- 

 mordial kidney. 



Epigas'trium, '/I. Pit of stomach ; upper belly, 

 next to brea-st. (A region not well distin- 

 guished in birds. The term is scarcely used. ) 

 (6i.) 



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

 pipe, rudimentary or wanting in birds. 



Epi(;xath'ocs, 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. 



