Defn: An animal having two successive sets of teeth.
DIPHYOZOOID
Diph`y*o*zo"oid, n. Etym: [Gr. zooid.] (Zoöl.)
Defn: One of the free-swimming sexual zooids of Siphonophora.
DIPLANAR
Di*pla"nar, a. Etym: [Pref. di- + plane.] (Math.)
Defn: Of or pertaining to two planes.
DIPLEIDOSCOPE
Di*plei"do*scope, n. Etym: [Gr. -scope.] (Astron.)
Defn: An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian.
DIPLEX
Di"plex, a. [Pref. di- + -plex, as in duplex.] (Teleg.)
Defn: Pertaining to the sending of two messages in the same direction at the same time. Diplex and contraplex are the two varieties of duplex.
DIPLOBLASTIC
Dip`lo*blas"tic, a. Etym: [Gr. -blast + -ic.] (Biol.)