nonsyllabic
non.syl.lab.ic \.na:n(t)-s*-'lab-ik\ aj : not constituting a syllable or
the nucleus of a syllable : of a consonant : accompanied in the same
syllable by a vowel {/n/ is syllabic in /'bat-*n-e-/ botany, ~ in
/'bat-ne-/} of a vowel : having vowel quality less prominent than that of
another vowel in the syllable {the second vowel of a falling diphthong is
~ (as /i/ in /o.i/)}
Webster's English Dictionary