单词 | monotelephone |
释义 | † monotelephonen. Obsolete. rare. Apparently only attested in dictionaries or glossaries. A telephone for transmitting sound of a particular pitch. ΚΠ 1890 Cent. Dict. Monotelephone, a telephone adapted for transmitting or receiving a sound of definite pitch or frequency of vibration. This entry has been updated (OED Third Edition, December 2002; most recently modified version published online June 2021). < n.1890 |
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