Definition of K/T boundary in English:

K/T boundary

Syllabification: K/T bound·a·ry

Origin

late 20th century: K/T, from the symbols for Cretaceous and Tertiary.

Definition of K/T boundary in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up