oligochaetous

enUK

ol·i·go·chaete

O0065200 (ŏl′ĭ-gō-kēt′, ō′lĭ-)n. Any of various annelid worms of the class (or subclass) Oligochaeta, including the earthworms and aquatic species found chiefly in freshwater, which lack the appendages typical of polychaetes.
[From New Latin Oligochaeta, class name : oligo- + chaeta.]
ol′i·go·chae′tous (-kē′təs) adj.