Of or pertaining to the large and diverse family of flowering plants known as Rubiaceae.

(organic chemistry) One of several colour-producing glycosides found in madder root.

(chemistry, obsolete) ruberythrinic acid

(rare, of a horse) Coloured mostly red, bay, or black, with flecks of white or grey especially on the flanks.

(mineralogy) An orange-red spinel.

plural of rubicelle

(organic chemistry) A substance found in madder root, and probably identical with ruberythrinic acid.

plural of rubicel

(pharmacology) Used to form names of daunorubicin derivatives used as antineoplastics.

present participle of rubicon