| DETECTOPHONES | • DETECTOPHONE n. a secret telephone for eavesdropping. |
| ELECTROPHONES | • electrophones n. Plural of electrophone. • ELECTROPHONE n. any instrument whose sound is produced by the oscillation of an electric current, such as an electronic organ, synthesizer, etc. |
| HARMONIPHONES | • harmoniphones n. Plural of harmoniphone. • HARMONIPHONE n. a keyboard wind instrument with reeds, also HARMONIPHON. |
| KALEIDOPHONES | • kaleidophones n. Plural of kaleidophone. • KALEIDOPHONE n. an instrument for demonstrating sound waves by lines of light. |
| MARIMBAPHONES | • marimbaphones n. Plural of marimbaphone. • MARIMBAPHONE n. a marimba. |
| METALLOPHONES | • metallophones n. Plural of metallophone. • METALLOPHONE n. an instrument like a xylophone with metal bars, the hammers being operated by hand or by means of a keyboard. |
| PICTUREPHONES | • picturephones n. Plural of picturephone. • PICTUREPHONE n. a device which allows speakers on the telephone to see each other. |
| SARRUSOPHONES | • sarrusophones n. Plural of sarrusophone. • SARRUSOPHONE n. a double-reeded musical instrument resembling the bassoon. |
| SPEAKERPHONES | • speakerphones n. Plural of speakerphone. • SPEAKERPHONE n. a combination microphone and loudspeaker device for two-way communication by telephone lines. |
| SPHYGMOPHONES | • sphygmophones n. Plural of sphygmophone. • SPHYGMOPHONE n. an instrument for hearing the pulse. |
| SYNECPHONESES | • synecphoneses n. Plural of synecphonesis. • SYNECPHONESIS n. the union into one syllable of two vowels without forming a recognized diphthong. |
| SYNECPHONESIS | • synecphonesis n. (Grammar) A contraction of two syllables into one; synizesis. • SYNECPHONESIS n. the union into one syllable of two vowels without forming a recognized diphthong. |
| THEATROPHONES | • THEATROPHONE n. (historical) a telephone connecting callers to a theatre so they can listen to a live performance there. |