cosmic background radiation
— Noun
– English
~ (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin
cosmic radiation
— Noun
– English
~ radiation coming from outside the solar system
cyanide radical
— Noun
– English
~ the monovalent group -CN in a chemical compound
cyano radical
— Noun
– English
~ the monovalent group -CN in a chemical compound
cacodyl radical
— Noun
– English
~ the univalent group derived from arsine
common ragweed
— Noun
– English
~ annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally
cable railway
— Noun
– English
~ a railway up the side of a mountain pulled by a moving cable and having counterbalancing ascending and descending cars
cog railway
— Noun
– English
~ railway for steep mountains; a cogwheel on the locomotive engages cogs on a center rail to provide traction