The Collaborative International Dictionary
battledoor \bat"tle*door`\, n. [OE. batyldour. A corrupted form of uncertain origin; cf. Sp. batallador a great combatant, he who has fought many battles, Pg. batalhador, Pr. batalhador, warrior, soldier, fr. L. battalia; or cf. Pr. batedor batlet, fr. batre to beat, fr. L. batuere. See Battle, n.]
An instrument, with a handle and a flat part covered with parchment or crossed with catgut, used to strike a shuttlecock in play; also, the play of battledoor and shuttlecock. [Also spelled battledore.]
[OE. battleder.] A child's hornbook. [Obs.]
--Halliwell.
Wiktionary
n. (alternative form of battledore English)
Usage examples of "battledoor".
Above all, he must not be deluded into believing that his condition can be permanently bettered by a mere battledoor [sic] and shuttlecock of words, or by any process of mere mental gymnastics or oratory.
They could see the gardener, with bowed back, patiently working among the flowers in the garden, the stable-boys below grooming the horses, a bevy of ladies in the privy garden playing at shuttlecock with battledoors of wood, a group of gentlemen walking up and down in front of the Earl's house.