Is this not absurd, when the same child can come home from school and talk glibly of a parallelepipedon, a rhombus, rhomboid, polyhedral angle, archipelago, law of primogeniture, the binomial theorem, and of a dicotyledon!

To show the excellence of this figure, he enumerates all its properties; and finds it in almost every thing of use or pleasure: and to show how readily he supplies what he cannot find, one instance may be sufficient: "though therein," says he, "we meet not with right angles, yet every rhombus containing four angles equal unto two right, it virtually contains two right in every one.

Fish were the chief object of the Roman epicures, of which the mullus, the rhombus, and the asellus were the most valued; it is recorded that a mullus (sea barbel), weighing but eight pounds, sold for eight thousand sesterces.

angular measurement, angular elevation, angular distance, angular velocity; trigonometry, goniometry; altimetry^; clinometer, graphometer^, goniometer; theodolite; sextant, quadrant; dichotomy. triangle, trigon^, wedge; rectangle, square, lozenge, diamond; rhomb, rhombus; quadrangle, quadrilateral; parallelogram; quadrature; polygon, pentagon, hexagon, heptagon, octagon, oxygon^, decagon. pyramid, cone.

If it got a reader's attention, rhombus would do, this I learned from the Herald.

Two such prisms set one behind the other can be made to give four images of equal brightness, occupying the four corners of a rhombus whose acute angles are 45°.