Biohazard Trefoil Circle black filled icon
Outline biohazard trefoil with three interlocking rings inside a circle
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About the Biohazard Trefoil Circle black filled icon
The standard biohazard trefoil is drawn as three interlocking broken rings around a small central circle, all set inside a thin outer ring. It signals biological risk: infectious material, contaminated waste, restricted lab zones and quarantine areas. Fits laboratory and hospital interfaces, waste disposal labeling, safety training decks, biosecurity documentation and public health or outbreak dashboards.
The three lobes sit at even 120 degree spacing with open gaps where the arcs cross, which keeps the shape recognizable without filling in. Pairs naturally with radiation, toxic and general warning icons. Because the arcs are thin and close, use it at 24 px or larger so the gaps do not close up.
This is the solid black filled version of the biohazard trefoil circle icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
Get it free as an SVG vector or transparent PNG (16-512px), copy the SVG code, or restyle it in the free online editor — recolor any part, add gold, neon or gradient effects, animate it, or export EPS, PDF and DXF.
Free for personal and commercial use with attribution.
