concavo-convex

American  

[kon-key-voh-kon-veks] / kɒnˈkeɪ voʊ kɒnˈvɛks /

adjective

1. Also concave on one side and convex on the other.

2. Optics. pertaining to or noting a lens in which the concave face has a greater degree of curvature than the convex face.

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concavo-convex British  

adjective

1. having one side concave and the other side convex

2. (of a lens) having a concave face with greater curvature than the convex face Compare convexo-concave

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Etymology

Origin of concavo-convex

1670–80; < Latin concav ( us ) + -o- + convex

Example Sentences

Winglets: small, concavo-convex scales, generally fringed at tip, under the base of the elytra in Dytiscidae.

From Explanation of Terms Used in Entomology by Smith, John. B.

Its root is long and fusiform; the stem is round, jointed and about a yard high; the leaves have fragrant leaflets; and the fruits are brown, oval and concavo-convex.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various

Lean forward, and, holding the hands concavo-convex, draw them up over the limbs severally, then cross on the chest as wrapping a blanket.

From Sign Language Among North American Indians Compared With That Among Other Peoples And Deaf-Mutes First Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1879-1880, Government Printing Office, Washington, 1881, pages 263-552 by Mallery, Garrick

"Why do you weep?" he asked, peering at the Boy through his concavo-convex Nose Glasses.

From Fables in Slang by Newman, Clyde J.

I measured therefore the thickness of this concavo-convex Plate of Glass, and found it every where 1/4 of an Inch precisely.

From Opticks or, a Treatise of the Reflections, Refractions, Inflections, and Colours of Light by Newton, Isaac, Sir