ˌjeməˈnāshən noun
( -s )
Etymology: Latin gemination-, geminatio, from geminatus (past participle of geminare ) + -ion-, -io -ion
: a doubling, duplication, or repetition: as
a. : a formation of two teeth from a single tooth germ
b.
(1) : a writing of a letter twice in succession in the spelling of a word
(2) : a making, becoming, or being geminated