"Convexo-Concave" is a word in ENGLISH

convexo-concave ENGLISH
Definition:

Convex on one side, and concave on the other. The
curves of the convex and concave sides may be alike or may be
different. See Meniscus.

Few words of positivity

Compassion can be learned through example

Renae A. Sauter, An Empowered Life: Mind/Body/Spirit Empowerment

WORD SUGGESTIONS
Laugh your heart out.

What did the snake say when he was offered a piece of cheese for dinner? Thank you, I'll just have a slither.

An apparatus in which the images of external objects, formed by a convex lens or a concave mirror, are thrown …

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