Whether written by hand or set into type, the Latin lower case alphabet implies an invisible staff consisting of at least four lines: topline, midline, baseline and beardline. The topline is the line reached by ascenders in letters like b, d, h, k, l. The midline marks the top of letters like a, c, e, m, x, and the top of the torso of letters like b, d, h. The baseline is the line on which all these letters rest. The beardline is the line reached by descenders in letters like p and q.

Imaginary horizontal line with which the top of the main body of each character, excluding ascenders, is aligned. Corresponds to the top of the x-height. See "x-height." See also "ascender," "baseline," "descender."

An imaginary vertical line down the centre of the body (figure 4, p8).

the median plane of the body (or some part of the body)

Center of the front upper teeth

An imaginary line which extends vertically through the middle of the face. Also the midline of a model through the centrals.

the vertical center of a postcard's reverse.

1) A line of cells, running from top to bottom, down the center of an embryo. 2) An imaginary line dividing the left and right halves of the body.

Median line or plane of bilateral symmetry in the body.

An imaginary vertical line that divides the face into equal parts.

An invisible reference line that runs longitudinally, and divides any body or object in half. With reference to the foot, it runs from heel to toes and divides the foot in half.

a line at the most central point of the frog's body

A horizontal line half way between the fingers and thumb.

an imaginary reference line down the center of the body separating left from right.

A plane through the very center of your mouth perpendicular to your nose.

Line that perpendicularly bisects the center line of the grip. A horizontal line halfway between the fingers and thumb.