[hahy-druh-kawr-uh l, -kor-]
any colonial marine animal of the hydrozoan order Stylasterina having a calcareous skeleton resembling that of the true corals.
Origin of hydrocoral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any hydrozoan coelenterate of the order Milleporina (or Hydrocorallinae), which includes the millepores
Word Origin for hydrocoral
C20: from hydro- + coral
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012