OBLONG

, sometimes means any figure that is longer than it is broad; but more properly it denotes a rectangle, or a right-angled parallelogram, whose length exceeds its breadth.

Oblong

, is also used for the quality or species of a figure that is longer than it is broad: as an Oblong spheroid; formed by an ellipse revolved about its longer or tranfverse axis; in contradistinction from the oblate spheroid, or that which is flatted at its poles, being generated by the revolution of the ellipfe about its conjugate or shorter axis.

OBSCURA Camera. See Camera Obscura.

Obscura Clara. See Clara Obscure.

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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.

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OBJECT
OBLATE
OBLATENESS
OBLIQUE
OBLIQUITY
* OBLONG
OBSERVATION
OBSERVATORY
OCCIDENT
OCCULT
OCCULTATION