Word of the week: “oniomania,” which is the medical term for compulsive shopping, coined by German psychologist Emil Kraepelin about 100 years ago. The “onio” part is derived from the Greek for “for sale.” You’re likely to be more familiar with the more contemporary synonym of “oniomaniac,” which is, of course, “shopaholic.” (Thanks to Amy Reynaldo of Chicago.)

n Exclave update: Two additional U.S. exclaves have been reported: a region in western Kentucky completely surrounded by Missouri and Tennessee, and several areas of Tennessee separated from the rest of the state by the west bank of the Mississippi. These anomalies were created by course changes in the Mississippi since their respective statehoods. (Thanks to Californians Ray Schnibben of Antioch and Clint Collier of Walnut Creek.)

At the recent commodity-exchange price of $120 per barrel of crude oil, what does that work out to, approximately, per gallon?

A) $1.85

B) $2.35

C) $2.85

D) $3.35

Friday’s answer: A cocktail with vodka and cranberry juice is called a Cape Cod because cranberries are grown in that region of Massachusetts.