Alfred North. 1861--1947, English mathematician and philosopher, who collaborated with Bertrand Russell in writing Principia Mathematica (1910--13), and developed a holistic philosophy of science, chiefly in Process and Reality (1929)
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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 tiny epidermal cystlike mass with a narrow or obstructed opening on the skin surface, which may rupture, caused by the retention of secretions of a sebaceous gland. Also called closed comedo.