ˈtripˌtōt noun
( -s )
Etymology: Late Latin triptoton, from Late Greek triptōton, neuter of triptōtos having only three cases, from Greek tri- three + -ptōtos (from piptein to fall, influenced in meaning by Greek ptōsis case, fall) — more at tri- , ptosis , feather
: a noun having three cases only — compare diptote