Defn: Having eight angles; eight-angled.
— Oc*tan"gu*lar*ness, n.
OCTANT
Oc"tant, n. Etym: [L. octans, -antis. fr. octo eight. See Octave.]
1. (Geom.)
Defn: The eighth part of a circle; an arc of 45 degrees.
2. (Astron. & Astrol.)
Defn: The position or aspect of a heavenly body, as the moon or a planet, when half way between conjunction, or opposition, and quadrature, or distant from another body 45 degrees.
3. An instrument for measuring angles (generally called a quadrant), having an arc which measures up to 9Oº, but being itself the eighth part of a circle. Cf. Sextant.
4. (Math. & Crystallog.)
Defn: One of the eight parts into which a space is divided by three coördinate planes.
OCTAPLA Oc"ta*pla, n.; etymol. pl., but syntactically sing. Etym: [NL., fr.Gr. -pla, as in E. hexapla; cf.Gr.