A chrysalis
Calcium is one.
Richard C Reardon has written: 'The gypsy moth nucleopolyhedrosis virus product' -- subject(s): Gypsy moth
The Big C is one
Century
One such item is Pinocchio's chin.
picnic for one
Charcoal is one.
i don't no
One is Cleopatra.
One preposition that starts with the letter "C" is "between." It indicates the spatial or temporal relationship between two things.
a mammal that starts C is a COW
candy