Noddy

n.; pl. Noddies [ Prob. fr. nod to incline the head, either as in assent, or from drowsiness. ] 1. A simpleton; a fool. L'Estrange.
Syn. -- tomnoddy. [ 1913 Webster ]

2. (Zool.) (a) Any tern of the genus Anous, as Anous stolidus. (b) The arctic fulmar (Fulmarus glacialis). Sometimes also applied to other sea birds. [ 1913 Webster ]

3. An old game at cards. Halliwell. [ 1913 Webster ]

4. A small two-wheeled one-horse vehicle. [ 1913 Webster ]

5. An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; -- used for detecting and measuring slight horizontal vibrations of a body to which it is attached. [ 1913 Webster ]