a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a fool or simpleton; ninny.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a gadget; dingus; thingumbob.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
1911, "study of the occult meaning of numbers," a hybrid from L. numerus "number" + Gk. -logia, from logos "one who speaks (of a certain topic)." A correct formation would be arithmology, from Gk. arithmos "number."