Umbellula
noun
Um·bel·lu·la
| \ ˌəmˈbelyələ\
Definition of Umbellula
: a genus (the type of the family Umbellulidae) of deep-sea alcyonarians consisting of a cluster of large flowerlike polyps at the summit of a long slender stem that stands upright in the mud and is supported by a bulbous base
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