co·pla·nar 
(kō-plānər)
(kō-plānər)adj.
Lying or occurring in the same plane. Used of points, lines, or figures.
co′pla·nari·ty (kō′plə-nărĭ-tē) n.
- heterokaryotic
- heterokont
- heterologous
- heterologously
- heterology
- heterolysis
- heterolytic
- heteromerous
- heteromorphic
- heteromorphism
- heteronomous
- heteronomously
- heteronormative
- heteronormatively
- heteronormativity
- heteronym
- heteronymous
- Heteroousian
- heterophonic
- heterophony
- heterophyllous
- heterophylly
- heteroplastic
- heteroplasty
- heteroploid