Holzknecht unit

Holz·knecht u·nit (H),

(hōlts'knekt),
an obsolete unit of x-ray dosage equal to one-fifth of the erythema dose.

Holzknecht unit

An obsolete unit equal to 1/5 erythema dose, formerly used to semi-quantify the dose of radiation.

Holzknecht,

Guido, Austrian radiologist, 1872-1931.
Holzknecht unit - an obsolete unit of x-ray dosage equal to one-fifth of the erythema dose.