Definition
The term 'catarrhinian' is an adjective describing primates belonging to the Catarrhini group. These primates, including humans, apes, and Old World monkeys, are characterized by their closely spaced, downward-pointing nostrils. Itβs just a more formal way of saying 'catarrhine'. Think of it as the slightly stuffier relative. These primates also typically have 32 teeth. It's mostly used in scientific classifications.π§