millepore
noun
mil·le·pore
| \ ˈmiləˌpō(ə)r\
Definition of millepore
: any of the stony hydrozoan reef-building corals comprising the order Milleporina with the single recent genus Millepora and like the madrepores with which they constitute the major reef-building corals assuming a variety of branching, encrusting, or massive forms though differing from the madrepores in passing through a free-swimming medusoid stage
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