thermae (????mi?) pl n (Historical Terms) public baths or hot springs, esp in ancient Greece or Rome[C17: from Latin, from Greek thermai, pl of therm? heat]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014thermaeRoman public baths.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited