tetrasyllable

tetrasyllable

(ˌtɛtrəˈsɪləbəl)
n
(Linguistics) a word of four syllables
tetrasyllabic, ˌtetrasylˈlabical adj

tet•ra•syl•la•ble

(ˈtɛ trəˌsɪl ə bəl, ˌtɛ trəˈsɪl-)

n.
a word or line of verse of four syllables.
[1580–90]
tet`ra•syl•lab′ic (-sɪˈlæb ɪk) adj.