D defs.my
Entry 5 senses Webster, 1913

Loggerhead

/läg'-ẽrh-ĕdˌ/ · Log·ger·head · IPA /ˈlɔɡɚˌhɛd/
01 n. A blockhead; a dunce; a numskull.
  1. 1.
    A blockhead; a dunce; a numskull.
  2. 2.
    A spherical mass of iron, with a long handle, used to heat tar.
  3. 3.
    An upright piece of round timber, in a whaleboat, over which a turn of the line is taken when it is running out too fast.(Naut.)
  4. 4.
    A very large marine turtle (Thalassochelys caretta syn. Thalassochelys caouana), common in the warmer parts of the Atlantic Ocean, from Brazil to Cape Cod; -- called also logger-headed turtle.(Zool.) Also: logger-headed turtle
  5. 5.
    An American shrike (Lanius Ludovicianus), similar to the butcher bird, but smaller. See Shrike.(Zool.) See: Shrike
Phrases & compounds
To be at loggerheads — to quarrel; to be at strife.