Definition of "interglacial"

Palaeoenvironmental evidence from northwest Europe indicates that the oligocratic phase of the interglacial cycle (Fig. 3.1) had begun by ca. 5K years BP.

2014, Antoinette Mannion, Global Environmental Change, page 71

The climatic recession which produced Britain's last glaciers came rapidly to an end about 10,000 bp, as temperatures rose during the end of the protocratic phase of the present interglacial.

2019, Peter Vincent, The Biogeography of the British Isles: An Introduction, page 209