If you are invited into the office of its director, you can see a clock on the wall that has a small hole near the numeral 1.
We all dance the entire DSM IV (and its coming progeny, the Roman numeral–free DSM 5) right down the line.
1520s, "word expressing a number," from Middle French numéral (late 15c.), from Late Latin numeralis "of or belonging to a number," from Latin numerus "a number" (see number (n.)). Meaning "figure standing for a number" is from 1680s. As an adjective, "expressing number," from 1520s.
A word or symbol used to represent a number.