Sea adder \Sea" ad"der\ (Zool.) (a) The European fifteen-spined stickleback ({Gasterosteus spinachia}); -- called also {bismore}. (b) The European tanglefish, or pipefish ({Syngnathus acus}). [1913 Webster]
Bismer \Bis"mer\, n. 1. A rule steelyard. [Scot.] [1913 Webster] 2. (Zool.) The fifteen-spined ({Gasterosteus spinachia}). [1913 Webster]