two-handed

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Requiring the use of two hands at once.
• adjective Made to be operated by two people.
• adjective Able to use both hands with equal facility; ambidextrous.
• adjective Having two hands.

from The Century Dictionary.

• Having two hands; bimanous, as man
• Requiring two hands to wield or manage: as, a two-handed sword.
• Using both hands equally well; ambidextrous; hence, handy at anything; adaptable; generally efficient.
• Adapted for use by two persons; requiring the hands of two persons: as, a two-handed saw (a whip-saw with a handle at each end); a twohanded float (a plasterers' float so large as to require two men to work it).

from the GNU version of the Collaborative International Dictionary of English.

• adjective Having two hands; -- often used as an epithet equivalent to large, stout, strong, or powerful.
• adjective Used with both hands.
• adjective Using either hand equally well; ambidextrous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective operated by both hands at once
• adjective operated by two people
• adjective ambidextrous
• adjective having two hands

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective equally skillful with each hand
• adjective requiring two hands or designed for two people