From inter- +‎ glacial.

• Rhymes: -eɪʃəl

interglacial (not comparable)

1. Occurring between glaciations (colloquially known as ice ages).
   • 2014, Antoinette Mannion, Global Environmental Change, page 71:

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

interglacial (plural interglacials)

1. The relatively warm period between glacial periods.
   • 2019, Peter Vincent, The Biogeography of the British Isles: An Introduction, page 209:

     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.

• interstadial

• antiallergic

• IPA^(key): /inteɾɡlaˈθjal/ [ĩn̪.t̪eɾ.ɣ̞laˈθjal] (Equatorial Guinea, Spain)
• IPA^(key): /inteɾɡlaˈsjal/ [ĩn̪.t̪eɾ.ɣ̞laˈsjal] (Latin America, Philippines)
• Rhymes: -al
• Syllabification: in‧ter‧gla‧cial

interglacial m or f (masculine and feminine plural interglaciales)

1. interglacial