twin spotted wainscot

Entomology: A European night-moth, Non agria gemini puncta. The fore wings are dingy olive brown, the hind wings brown. On the former a small double spot, white, dark brown, or white sur rounded by dark brown. The caterpillar lives in the hollow of the Common reed, Arundo phragmites . twin steam-engine, subst . Another name for a duplex engine; one in which two engines, complete in their parts, are a ociated in a single effort. twin-steamer, subst. The same as TWIN-BOAT (q. v.).