macula densa

In order then to avoid diplopia the macula lutea moves to where the retinal image is formed.

In P. densa it is at first of a very irregular form, but assumes by degrees a regular globose shape.

The macula rash was entirely unique so far as I knew, but a sketch greatly helped to fix it on one's memory.

Mail comes from the Latin macula, the mesh of a net; and the first coats of mail were made of rings or a kind of metal network.