sistroid
sistroid
(ˈsɪstrɔɪd)adj
(Mathematics) contained between the convex sides of two intersecting curves. Compare cissoid2
[C20: from sistrum + -oid]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014