Q. What is the proper way to capitalize (or not capitalize) “generation X”? Merriam-Webster lists “baby boom” and “baby boomer,” which I would normally take as a precedent, but it seems that “generation” should be capitalized because it precedes a single letter. Has this been decided?

A. Your instincts agree with American Heritage, the fourth edition of which (available through includes for this epithet the capitalized entry “Generation X” (as well as “Generation Y”).