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thermotelephone
thermotelephone n.
Brit. 
/ˌθəːmə(ʊ)ˈtɛlᵻfəʊn/
, /ˌθəːmə(ʊ)ˈtɛlᵻfəʊn/U.S. /ˌθərmoʊˈtɛləˌfoʊn/
a thermo-electric telephone./ˌθərmoʊˈtɛləˌfoʊn/ΘΚΠ
society > communication > telecommunication > other types of sound telecommunication > [noun] > apparatus
telephone1832
electrophone1864
magneto-telephone1878
thermophone1878
photophone1880
radiophone1881
teleradiophone1881
thermotelephonea1884
telegraphophone1889
theatrophone1889
hydrograph1893
sonobuoy1937
a1884 E. H. Knight Pract. Dict. Mech. Suppl. 893/1 Thermo-telephone.
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