- A worm that lives in the ground; a worm of Lumbricidae family, or, more generally, of Lumbricina suborder.
- A disparaging reference to a person, particularly one who grovels.
- A figurative reference to death.
- Any member of the Echinodermata, a group of radially symmetric, spiny-skinned marine animals. Examples of echinoderms include seastars, sea urchins, sea cucumbers, crinoids, and sand dollars.