| Sabouraud-Noire instrument | An obsolete device for measuring the quantity of X-rays by means of the change in colour of a disk of barium platinocyanide which exposure to them produces; the unit used in this method is called tint B = erythema dose. (05 Mar 2000) |
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| tache noire | Black spot (in French), a small ulcer covered with a black crust at the site of a tick bite, characteristic of several tick-borne rickettsial diseases. (12 Dec 1998) |