structureless

Now, on our view, that colouration follows structure, we ought to find an absence of decoration in this structureless group.

The more I have studied these structureless beings—cells without nuclei!

These structureless plasma bodies show unmistakably that their vital activity is a purely chemical phenomenon.

The ventral surface is very narrow towards the posterior end of the animal; it is formed of thin, structureless membrane.

The small particles of protoplasm which constitute "cells" are far indeed from being structureless.