coralloid

/K AO0 R AE1 L OY0 D/
noun
  1. 1

    A small node of calcite, aragonite or gypsum that forms on surfaces in caves, especially limestone caves.

Synonyms

adjective
  1. 1

    Having the shape or form of coral.

Synonyms

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