Alternative form of Dr: abbreviation of doctor. / Abbreviation of drive (type of public roadway, when part of a specific street’s name).

(archaic) White or pale; without colour. / Free from writing, printing, or marks; having an empty space to be filled in / (figuratively) Lacking characteristics which give variety; uniform.

dimethyltubocurarinium

(inorganic chemistry) Alternative spelling of aluminium chloride