Webster's Revised Unabridged Dictionary · 1913

Edder

Edder , noun

[See Adder.]

(Zoology) An adder or serpent. [Provincial English] — Wright

Edder , noun

[Anglo-Saxon edor hedge, fence; akin to etar.]

Flexible wood worked into the top of hedge stakes, to bind them together. [Obsolete] — Tusser

Edder , transitive verb

To bind the top interweaving edder; as, to edder a hedge. [Obsolete]