D defs.my
Entry 1 sense Webster, 1913

Oblongum

· Ob·lon·gum · IPA
01 n. A prolate spheroid; a figure described by the revolution of an ellipse about its greater axis. Cf. Oblatum, and see Ellipsoid of revolutio…
pl. Oblonga ((#))
  1. 1.
    A prolate spheroid; a figure described by the revolution of an ellipse about its greater axis. Cf. Oblatum, and see Ellipsoid of revolution, under Ellipsoid.(Geom.) See: Oblatum, Ellipsoid