Merriam Webster: Dictionary Illustration: Eye Anatomy

Basic diagram of a solar eclipse illustrates the relative positions of the sun, moon, and earth.

Basic diagram illustrating five main structures of a feather.

A labeled diagram of the parts of a fish.

This is basic cloud chart illustrating shape and relative altitude of ten key cloud types. Scroll down to the bottom for the list of cloud types by name.

Labeled illustration of a cabbage butterfly.

Labeled illustration of a bacteriophage.

Labeled illustration of inflorescence, which refers to flowering or a flower cluster.

Labeled illustration of a neuron, with callouts for the nerve body, dendrites, axon, and endings.

Labeled illustration of twenty-five types of leaves: pinnate, palmate, cordate, etc.

Labeled illustration of a plant and an animal cell and their parts.