deferent
nounEtymology From Middle English defferent, from Middle French deferent (modern French déférent) or its etymon Latin dēferēns, dēferentis.
Historical An imaginary circle surrounding the Earth, in whose periphery either the heavenly body or the centre of the heavenly body's epicycle was supposed to be carried round.
Ptolemaic astronomy
Obsolete That which carries or conveys.
- though air be the most favorable deferent of sounds1627 (indicated as 1626), Francis [Bacon], “(please specify the page, or |century=I to X)”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], London: […] William Rawley […]; [p]rinted by J[ohn] H[aviland] for William Lee […], →OCLC: