Twitter Google Share on Facebook acalephan (ˌækəˈliːfən) n (Zoology) an acaleph adj (Zoology) of or relating to the acalephs Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 200...