horizontal planes

hor·i·zon·tal planes

[TA] plane parallel and relative to the horizon; in the anatomic position, horizontal planes are transverse planes; in the supine or prone positions, horizontal planes are frontal (coronal planes). Synonym(s): plana horizontalia [TA]

hor·i·zon·tal planes

(hōr-i-zontăl plānz) [TA] Planes parallel and relative to the horizon; in the anatomic position, horizontal planes are transverse planes; in the supine or prone positions, horizontal planes are frontal (coronal planes).
Synonym(s): plana horizontalia [TA] .