tailfan


tailfan

(ˈteɪlˌfæn) n (Zoology) the fanned structure at the hind end of a lobster or related crustacean, formed from the telson and uropods

tail•fan

(ˈteɪlˌfæn)
n. the fanlike posterior appendage of crayfish and lobsters, used for backward propulsion. [1890–95]