| Answer | Crossword Clue |
|---|---|
| anestrous | relating to anestrus, a period of sexual inactivity between periods of estrus |
| diestrus | (in most female mammals) A period of sexual inactivity between recurrent periods of estrus |
| anoestrous | relating to anoestrus, a period of sexual in activity between periods of oestrus |
| dioestrus | (in female mammals) an interval of sexual inactivity between periods of estrus |
| interglacial | Of or relating to a period of milder climate between two glacial periods |
| carboniferous | Of, relating to, or denoting the fifth period of the Paleozoic era, between the Devonian and Permian periods |
| triassic | Of, relating to, or denoting the earliest period of the Mesozoic era, between the Permian and Jurassic periods |
