1750 J. Huxham i. 9 It may be easily supposed that sub-tepid Diluters internally will have an analogous Effect.
1891 Jan. 462/1 On the counter stood a large pitcher..brimming with water of a sub-tepid temperature.
2007 P. L. Younger iii. 55/1 Its density and/or viscosity are likely to be sufficiently different from those of ordinary, fresh, sub-tepid groundwaters.