tremulate

tremulate

(ˈtrɛmjʊˌleɪt)
vb (intr)
to make a tremulous sound
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References in periodicals archive ?
When the female approaches the male to a distance of ~ 10 cm, he stops singing, and begins to tremulate regularly with 5 to 10-s silent intervals between tremulations.
Ambulance tremulates lengthening silences In an opaline shell navigating space you