spongia dura

1 definition found

spongia dura - Collaborative International Dictionary of English v.0.48 :

  Hardhead \Hard"head`\ (-h[e^]d`), n.
     1. Clash or collision of heads in contest. --Dryden.
        [1913 Webster]
  
     2. (Zool.)
        (a) The menhaden. See Menhaden. [Local, U. S.]
        (b) Block's gurnard (Trigla gurnardus) of Europe.
        (c) A California salmon; the steelhead.
        (d) The gray whale. See Gray whale, under Gray.
        (e) A coarse American commercial sponge (Spongia dura).
            [1913 Webster] hardheaded