...But the peculiarity that is most likely to catchthe eye of the traveller is the white disc on itsrear... 
Ernest Thompson Seton 「Wild Animals at Home」
...This action is momentary or very brief; thespread disc goes down again in a few seconds...
Ernest Thompson Seton 「Wild Animals at Home」
...The sun'scopper disc was dyeing the purple and blue watersof the bay with vermilion and magentas when hepad-padded out on the veranda of the controlleur'shouse...
John Charles Beecham 「The Argus Pheasant」
...Discal patch: in some male Hesperidae the obliquestreak of specialized black scales on the disc of theprimaries...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Disciform: formed or shaped like a disc...
John. B. Smith 「Explanation of Terms Used in Entomology」
...A, B, C, Sections through epidermis and cuticle,showing three stages in growth of the imaginal disc (w) of a wing inthe caterpillar of a White Butterfly (Pieris)...
Geo. H. Carpenter 「The Life-Story of Insects」
...vittatus is less bilobed and has amore pronounced disc at the apex thanthe others...
John Wellman 「A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)」
...lineatus concolor is most bilobed, but hasthe smallest apical disc...
John Wellman 「A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)」
...Between it and the otostapes is a small disc,usually ossified, the operculum, which normally fits loosely in aportion of the fenestral membrane, and is developed from the oticcapsule...
Theodore H. Eaton 「The Ancestry of Modern Amphibia: A Review of the Evidence」
...The eyes, however, instead ofbeing circular like those of the bee are made as narrow elongatedprojections extending inward from the dorsal margin of the facial disc...
Alfred M. Tozzer and Glover M. Allen 「Animal Figures in the Maya Codices」
...The facial disc isdivided into three parts by a median area of straight or irregularlateral boundaries ending anteriorly in two in-turned scrolls suggestingthe alae of the nose...
Alfred M. Tozzer and Glover M. Allen 「Animal Figures in the Maya Codices」
...Its tread is composed of several cells, and isnow commonly called the germinal disc...
Ernst Haeckel 「The Evolution of Man」
...Being thus summoned by the sun's disc and facing upward, herlower half, as it is not luminous, is invisible on account of itslikeness to the air...
Vitruvius 「Ten Books on Architecture」
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