plano-convex

The subject of distortion was next treated of, and the manner in which the idea of a non distorting doublet could be evolved from a single bi-convex lens by division into two plano-convex lenses with a central diaphragm was shown.

Scientific American Supplement, No. 415, December 15, 1883 Various

Bricks still plano-convex; stamped inscriptions begin.

How to Observe in Archaeology Various

The fourth glume is coriaceous or crustaceous, plano-convex, bisexual, 5-nerved and paleate; palea is as long as the glume.

A Handbook of Some South Indian Grasses K. Rangachari

We wandered along the excavated streets that were bordered by low walls of sun baked plano-convex bricks and marvelled at the state of preservation.

Coming of Age: 1939-1946 John Cox

In this way plano-convex lenses are easily and cheaply made.

On Laboratory Arts Richard Threlfall

The _fourth glume_ is elliptic-oblong, plano-convex, subobtuse, smooth or shining, though faintly striate, coriaceous with incurved margins; _palea_ is coriaceous, as long as the glume, elliptic, faintly striate.

A Handbook of Some South Indian Grasses K. Rangachari

In fact, a plano-convex crystal lens has been found among the ruins of

Scientific American Supplement, No. 392, July 7, 1883 Various

Galileo's telescope consisted of two lenses -- one plano-convex, the other plano-concave, the latter being held next the eye.

The Astronomy of Milton's 'Paradise Lost' Thomas Nathaniel Orchard

The spikelets are plano-convex, orbicular to oblong, obtuse, secund, 2-ranked on the flattened or triquetrous rachis of the spike-like branches of a raceme, one-flowered and falling off entire from the very short or obscure pedicels.

A Handbook of Some South Indian Grasses K. Rangachari

Bricks made this way were called plano-convex because five faces were flat and the sixth convex; each bore the imprint of a thumb on the convex face, formed as the brick was ejected from the mould.

Coming of Age: 1939-1946 John Cox