Definition of geminate in English:

geminate

adjective

Phonetics
  • Consisting of identical adjacent speech sounds; doubled:

    ‘consonants motivating a short vowel were all originally geminate’
    • ‘Some geminates, however, are clearly more morphologically distinct than others are.’

verb

[WITH OBJECT]Phonetics
  • Double or repeat (a speech sound):

    ‘a medial liquid is geminated over two syllables’
    • ‘For many words, however, the most common misspelling seems to be to violate conservation of geminates, and write the word with no doubled consonants at all.’
    • ‘Because gemination is common in Dravidian languages, double consonants in written English are often geminated: ‘sum-mer’ for summer and ‘sil-lee’ for silly.’
    • ‘Like English geminates and schwas, Hebrew matres lectionis have a more ambiguous relation to speech than graphemes that code consonants, for example, and are thus coded less effectively.’

Origin

Late Middle English: from Latin geminatus, past participle of geminare double, pair with, from geminus twin.

Pronunciation:

geminate

/ˈdʒɛmɪneɪt/