1) Body axis 2) Halfway to the entrance 3) Midplane 4) Plane 5) Sheet 6) The median plane of the body 1) Midplane 
the centre line of the body in the anatomical position.
Region towards the middle of the scalp
A plane through the very center of your mouth perpendicular to your nose.
In the graph of a trigonometric function, the horizontal line halfway between its maximum and minimum values
imaginary line through the middle of an object which divides it into two equal parts.
An imaginary vertical line that divides the face into equal parts. A symmetrical midline extends from the top of the nose in between the two front top and bottom teeth and the tip of the chin.
The centre line of the body in the anatomical position.
<dentistry> A plane through the very centre of your mouth perpendicular to your nose. ... (08 Jan 1998) ... 
(mid´līn) the imaginary line that divides the body into right and left halves.
An imaginary line extending along the center of a projectile from the distal tip to the midpoint of the basal edge.
Region toward the middle of the scalp.
An imaginary vertical line that divides the face into equal parts.