Synonym: accidentally, apropos, by chance, by the bye, by the way. Similar words: incidental, occidental, accidental, incident, incidence, coincidence, accident, dental. Meaning: [‚ɪntlɪ] 
adv. 1. introducing a different topic 2. in an incidental manner 3. by the way.
adv. 1. introducing a different topic 2. in an incidental manner 3. by the way. 151. Incidentally, can you tell which direction the particles, represented by the white lines, are traveling?
More similar words: incidental, occidental, accidental, incident, incidence, coincidence, accident, dental, mentally, by accident, transcendentalism, coincide, sentimental, rental, mental, parental, evident, trident, sedentary, incremental, ornamental, identify, resident, identity, strident, fundamental, sacramental, experimental, detrimental, provident.