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trigonal
trigonometric
trigonometric function
trigonometry
trigonous
trigram
trigraph
trihalomethane
trihedron
trihydric
triiodothyronine
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trike
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trilateralism
trilateration
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trillion

tril·lion [ tríllyən ] (plural tril·lion or tril·lions)


noun 
Definition:
 
1. 1 followed by 12 zeros: the number equal to 1012, written as 1 followed by 12 zeros

2. U.K. 1 followed by 18 zeros: the number equal to 1018, written as 1 followed by 18 zeros ( dated )

3. large number of something: an exceptionally large but unspecified number or amount of something ( informal ) ( often used in the plural )
had trillions of fans wanting to meet her

[Late 17th century. < French, after million]

tril·lion adjective
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