A symbol universally associated with recyclable materials. It is composed of three crooked arrows arranged as a triangular clockwise Möbius strip.

plural of biohazard symbol

A symbol that is universally recognized as a warning against substances that pose a threat to the health of living organisms, primarily that of humans.

A numero sign.

plural of infinity symbol

A lemniscate; the figure ∞ that represents infinity.

plural of numero symbol

A circumscribed uppercase "A", denoting anarchy.

plural of anarchy symbol

(chemistry) the 1- to 3-letter international code for a chemical element