Added 9 October 2026
c
/siː/ noun
Latin root: lower Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about c at Wordnik → Where our words come from →
- A degree on the centigrade scale of temperature.
- The speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second.
- A vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy.
adjective
Origin
Old English lower case letter c, from 7th century replacement by Latin lower case c of the Anglo-Saxon Futhorc letter ᚳ (c, “cen”).
From Wiktionary, via Kaikki.org (CC BY-SA)