Cenozoic

• Caenozoic, Cænozoic, Cainozoic, Kainozoic

ceno- +‎ -zoic; from Ancient Greek καινός (kainós, “new”) + ζωή (zōḗ, “life”)

• (UK) IPA^(key): /ˌkeɪnəʊˈzəʊɪk/, /ˌsɛnɵˈzəʊɪk/, /ˌsiːnɵˈzəʊɪk/
• (US) IPA^(key): /ˌkɛnɵˈzoʊɪk/, /ˌsɛnɵˈzoʊɪk/, /ˌsinɵˈzoʊɪk/
• Rhymes: -əʊɪk

The pronunciations with /k/ were the only ones in use until the twentieth century. The forms with /s/ were considered incorrect pronunciations until at least the 1950s and still may be by some speakers today.

Cenozoic (not comparable)

1. (geology) Of or pertaining to the Cenozoic era.

Cenozoic

1. (geology) A geologic era within the Phanerozoic eon comprising the Paleogene, Neogene and Quaternary periods from about 65 million years ago to the present, when the continents moved to their current position and modern plants and animals evolved.
   • 1883, Joseph Le Conte, Elements of Geology: A Text-book for Colleges and for the General Reader, New York: D. Appleton and Company:

     The whole history of the earth is divided into five eras, with corresponding rock-systems. These are: 1. Archæan or Eozoic¹ era, embodied in the Laurentian system; 2. Palæozoic² era, embodied in the Palæozoic or Primary system; 3. Mesozoic³ era, recorded in the Secondary system; 4. Cenozoic,⁴ recorded in the Tertiary and Quaternary systems; and, 5. The Psychozoic era, or era of Mind, recorded in the recent system.

   • 2019 September 10, Katherine Kornei, “A New Timeline of the Day the Dinosaurs Began to Die Out”, in The New York Times‎, →ISSN:

     The researchers found that the first day of the Cenozoic was peppered with cataclysms. When the asteroid struck, it temporarily carved a hole 60 miles across and 20 miles deep.

• Neozoic

• Appendix:Geologic timescale

• Cenozoic on Wikipedia.Wikipedia