.DCT File Extension

Data file used by various dictionary, translation, or word processing applications; typically contains a list of words and may also include definition or translation information; often used for spell-checking and may be available in different languages.

Contains textual notes about a FoxPro database (.DBC file).

Variable codec audio format designed for dictation (recording human speech); includes a dictation header and can be encrypted, which may be required by medical confidentiality laws

Word dictionary used by AutoCAD, a CAD productivity application; stores a list of words used by the spell checker for identifying misspelled words; can be extended with custom user dictionaries, which are stored in .CUS files.