M&M® PDF Print E-mail
Included in the Dictionary only because we need a clarification on the singular and the plural. The singular is "an M&M®."  Note that "an M" is not generally used by literate society as the singular.  The plural is "M&M's®," of course, and spelled that way too.  It is not a possessive; however, this spelling is based on the grammatical rule that if a word ends with a single capital letter that stands for something else, such as in an acronym, then an apostrophe, in fact, and an "s," are used to make it plural.