BIPRISM
Bi"prism, n. [Pref. bi- + prism.]
1.
Defn: A prism whose refracting angle is very nearly 180 degrees.
2. A combination of two short rectangular glass prisms cemented together at their diagonal faces so as to form a cube; — called also optical cube. It is used in one form of photometer.
BIPUNCTATE
Bi*punc"tate, a. Etym: [Pref. bi- + punctate.]
Defn: Having two punctures, or spots.
BIPUNCTUAL
Bi*punc"tu*al, a.
Defn: Having two points.
BIPUPILLATE
Bi*pu"pil*late, a. Etym: [Pref. bi- + pupil (of the eye).] (Zoöl.)
Defn: Having an eyelike spot on the wing, with two dots within it of a different color, as in some butterflies.