either-handed en · ADJ
Etymology
From either + handed.
Meanings
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(not-comparable) Able to use either (right or left) hand, often equally well; ambidextrous.
There certainly is, amongst mankind, a vast weight of opinion against my position that man is, by nature, as either-handed as an ape, and that custom should follow nature.
1879, Browne's Phonographic Monthly, volume 4, page 231: