employing or involving land, naval, and air forces in a combined operation.
Origin of triphibious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(esp of military operations) occurring on land, at sea, and in the air
Word Origin for triphibious
C20: from tri- + (am) phibious
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