ˈkīrəˌmōn, -rō-
Etymology: Greek kair os critical time, opportunity, advantage + English -o- + -mone (as in pheromone — herein) — more at kairos
: a chemical substance emitted by one species and especially an insect or plant that has an adaptive benefit (as a stimulus for oviposition) to another species and either provides no benefit or an unfavorable outcome to the species emitting the substance and that is sometimes used in a natural or synthetic form in the control of certain insect pests