coelo-

From international scientific vocabulary, reflecting a New Latin combining form, from Ancient Greek κοῖλος (koîlos, “hollow; concave; a cavity, hollow”) (ultimately from Proto-Indo-European *ḱewh₁- (“to swell; to be strong”)); developed from such earlier Latin terms as coeliac and coelom.

1. 01
   derived from *ḱewh₁-✻ — “to swell; to be strong”
2. 02
   derived from κοῖλος — “hollow; concave; a cavity, hollow”