Merriam Webster: Dictionary Illustration: Cell

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

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

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.

Basic diagram illustrating five main structures of a feather.

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 the human heart, with callouts for the aorta, pulmonary artery, venticles, and atria.

Labeled illustration of the principal parts of the eye.

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