|d denoting one tenth; 10--1: decimetre|
|[from French déci-, from Latin decimus tenth]|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
One tenth (10-1): decibel.
A prefix that means "one tenth," as in deciliter, one tenth of a liter.