Carnal-mindedness (n.)
definition: Grossness of mind.

Carnal-mindedness is a 17 letter word that begins with a C and ends in an S

Castor and Pollux
definition: See Saint Elmo's fire
Under Saint.
Castor and Pollux is a 17 letter word that begins with a C and ends in an X

Cat o' nine tails
definition: See under Cat.

Cat o' nine tails is a 17 letter word that begins with a C and ends in an S

Charge d'affaires (n.)
definition: A diplomatic representative
Or minister of an inferior grade accredited by the government of one state to the minister of foreign affairs of another; also a substitute ad interim for an ambassador or minister plenipotentiary.
Charge d'affaires is a 17 letter word that begins with a C and ends in an S

Chief-justiceship (n.)
definition: The office of chief justice.

Chief-justiceship is a 17 letter word that begins with a C and ends in a P

Chiltern Hundreds
definition: A tract of crown land in Buckinghamshire and Oxfordshire
England to which is attached the nominal office of steward. As members of Parliament cannot resign when they wish to go out they accept this stewardship which legally vacates their seats.
Chiltern Hundreds is a 17 letter word that begins with a C and ends in an S

Chipping squirrel
definition: See Chipmunk.

Chipping squirrel is a 17 letter word that begins with a C and ends in an L

Chromolithography (n.)
definition: Lithography adapted to printing in inks of various colors.

Chromolithography is a 17 letter word that begins with a C and ends in a Y

Chromophotography (n.)
definition: The art of producing photographs in colors.

Chromophotography is a 17 letter word that begins with a C and ends in a Y

Chronogrammatical (a.)
definition: Belonging to a chronogram
Or containing one.
Chronogrammatical is a 17 letter word that begins with a C and ends in an L

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