Defn: A nitrogenous base homologous with pyridine, obtained from coal tar as an oily liquid, C11H17N; also, any one of the group od metameric compounds of which rubidine is the type.
RUBIDIUM
Ru*bid"i*um, n. Etym: [NL., fr. L. rubidus red, fr. rubere to be red.
So called from two dark red spectroscopic lines by means of which it
was discovered in the lepidolite from Rozena, Moravia. See Rubicund.]
(Chem.)
Defn: A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.2.
RUBIFIC
Ru*bif"ic, a. Etym: [L. ruber red + facere to make.]
Defn: Making red; as, rubific rays. Grew.
RUBIFICATION
Ru`bi*fic*a"tion, n. Etym: [Cf. F. rubification.]
Defn: The act of making red. Howell.
RUBIFORM
Ru"bi*form, a. Etym: [L. ruber red + -form.]
Defn: Having the nature or quality of red; as, the rubiform rays of the sun. [R.] Sir I. newton.
RUBIFY
Ru"bi*fy, v. t. Etym: [Cf. F. rubéfier. See Rubific.]