ˈbīōˌhərm noun
( -s )
Etymology: bi- (II) + Greek herma sunken rock, reef — more at wart
: a body of rock built up by or composed mainly of sedentary organisms (as corals, algae, or mollusks) and enclosed or surrounded by rock of different origin — compare biostrome
• bi·o·her·mal | ̷ ̷ ̷ ̷|hərməl adjective