madreporite

/หŒmรฆdษนษ™หˆpษ”ษนaษชt/

IPA: /M AA1 D R EY0 P ER0 AY0 T/

noun
  1. 1

    A calcareous opening in the body of echinoderms which connects the water vascular system to the environment.

  2. 2

    A fossil stony coral, or a deposit composed of the same.

Source: https://en.wiktionary.org/wiki/madreporite