chin / chine are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
chin: (noun) the protruding part of the lower jaw. (verb) raise oneself while hanging from one's hands until one's chin is level with the support bar.
chine: (noun) cut of meat or fish including at least part of the backbone. (noun) backbone of an animal. (verb) cut through the backbone of an animal.
chin: ch·IH·n
chine: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)