Etymology of Scientific Words

convex

ˈkɒnvɛks/

adjective

adjective: convex

1. 1.

   having an outline or surface curved like the exterior of a circle or sphere.

   "a convex lens"

   synonyms:

   curved outwards, cambered; More

   antonyms:

   concave

2. 2.

   (of a polygon) not having any interior angles greater than 180°.

Origin

late 16th century: from Latin convexus ‘vaulted, arched’.

concave

ˈkɒnkeɪv/

adjective

adjective: concave

1. having an outline or surface that curves inwards like the interior of a circle or sphere.

   "concave lenses"

   synonyms:

   curved inwards, hollow, hollowed out, scooped out, depressed, sunken; More

   antonyms:

   convex

Origin

late Middle English: from Latin concavus, from con- ‘together’ + cavus ‘hollow’.