discoidal

Archaeologists are finding discoidal cores all along the Pacific coast—the putative migration route for the first Americans.

From the lemurs, on the other hand, the form of the brain, the character of the teeth, the structure of the skull, and the deciduate discoidal placenta at once separate the group.

Consequently it is exceedingly useful to know what is meant by the terms base, costal margin, apex, hind margin, anal angle, inner margin, discoidal cell &c. as applied to the wing.

In shape they are spheroidal, ellipsoidal or discoidal; in structure they may be solid, hollow or more or less cavernous; whilst in size they vary from that of a walnut to masses weighing several tons.

Occasionally a tail-like appendage is added to the under side of these discoidal heads, suggesting the tadpole figures upon the sacred water vessels of the Pueblo Indians.