There are 2 definitions of Ci in English:

Ci1

Syllabification: Ci

abbreviation

1Cirrus.
1.1Curie.

Definition of Ci in:

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude

There are 2 definitions of Ci in English:

CI2

Syllabification: CI

abbreviation

1Certificate of insurance.
1.1Channel Islands.
1.2Cost and insurance.

Definition of Ci in: