DIPTYCH
Dip"tych, n. Etym: [L. diptycha, pl., fr. Gr.
1. Anything consisting of two leaves. Especially: (a) (Roman Antiq.) A writing tablet consisting of two leaves of rigid material connected by hinges and shutting together so as to protect the writing within. (b) A picture or series of pictures painted on two tablets connected by hinges. See Triptych.
2. A double catalogue, containing in one part the names of living, and in the other of deceased, ecclesiastics and benefactors of the church; a catalogue of saints.
DIPYRE
Di*pyre", n. Etym: [Gr. (Min.)
Defn: A mineral of the scapolite group; — so called from the double effect of fire upon it, in fusing it, and rendering it phosphorescent.
DIPYRENOUS
Di`py*re"nous, a. Etym: [Pref. di- + pyrene.] (Bot.)
Defn: Containing two stones or nutlets.
DIPYRIDINE
Di*pyr"i*dine (; 104), n. Etym: [Pref. di- + pyridine.] (Geom.)
Defn: A polymeric form of pyridine, C10H10N2, obtained as a colorless oil by the action of sodium on pyridine.
DIPYRIDYL
Di*pyr"i*dyl, n. Etym: [Pref. di- + pyridine + -yl.] (Chem.)