Multi-legged creature
A multi-legged creature was any lifeform with multiple legs. Examples included hexapods, quadrupeds, and bipeds. 

Harry Mudd referred to Stuart as his "multi-legged friend". ()  

Spock once told an Eminian guard that "[t]here's a multi-legged creature crawling on your shoulder," before reaching towards him and applying a neck pinch. ()

Lifeform classifications