Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
resonator is a noun meaning "a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves". It carries 3 recorded senses.
a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves
an electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude
any system that resonates
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for resonator come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.