1) Aircraft configuration 
A coleopter is a type of vertical take-off and landing aircraft design that uses a ducted fan as the primary fuselage of the entire aircraft. Generally they appear to be a large barrel-like extension at the rear, with a small cockpit area suspended above it. Like most ducted fan designs, coleopters are generally arranged to take off and land on it...
• (n.) One of the Coleoptera.
Co`le·op'ter noun (Zoology) One of the Coleoptera.