Four Hand construction

3D hand tracking

4% chlorhexidine surgical hand disinfectant

a bird in the hand

A bird in the hand is worth two in the bush

a free hand

a hand of bananas

a helping hand

a light hand

a sleight of hand

Abney hand-level

AC powered hand tools

acceleration after hand close switch

accoucheur’s hand

accumulator-powered hand lamp

Aconitum flavum Hand-Mazz

Acquired absence of hand and wrist

across-the-line starting by hand

acute occupational traumatic hand Injury

adjust by hand