in heat
(biology) in estrus; receptive to mating
Arc welding falls between these two extremes, with the individual processes varying somewhat in heat input. Source: Internet
By contrast, Priestley preferred to observe qualitative changes in heat, color, and particularly volume. Source: Internet
As Matthiessen demonstrates, Ahab's first extended speech to the crew, in the "Quarter-Deck" (Ch.36), is "virtually blank verse, and can be printed as such": But look ye, Starbuck, what is said in heat, That thing unsays itself. Source: Internet
For though the world has stood up and stopped the bastard, the bitch that bore him is in heat again." Source: Internet
Eventually (see the discussion in heat capacity ) it became clear that heat capacities per particle for all substances in all states are the same, to within a factor of two, so long as temperatures are not in the cryogenic range. Source: Internet
Circus had little interest in my mare (who of course was in heat) or the two geldings my companions were on. Source: Internet