syllabification
Concise Oxford English Dictionary © 2008 Oxford University Press:
syllabification /sɪˌlabɪfɪˈkeɪʃ(ə)n/ (also syllabication)
▶noun the division of words into syllables.
– derivatives
syllabify verb (syllabifies, syllabifying, syllabified).
syllabify verb (syllabifies, syllabifying, syllabified).
'syllabification' also found in these Oxford entries:

