Trefoil used in a sentence

Trefoil in a sentence as a noun

I woke up and realized the structure might be a trefoil.

" "Oh, hello... uhh, so those signals were your house and not a trefoil of two black holes and a quasar?

The ISO 21482 symbol isn't precisely an update to the trefoil.

The abstract radiation trefoil is only meaningful if you know what it means.

The only protection was an chain-link fence, a radiation warning trefoil, and a street light.

It's a stone slab, etched with a "no pedestrians" road sign symbol, a radiation trefoil, and a bottle with a skull and crossbones.

Things like the radioactive trefoil, or the biohazard sign.

Inhabitants of the future could just assume the trefoil-material has some negative effect on trees as it heals the sick.

Talking about reactor waste with an image of 55 gallon steel drums with the radiation trefoil on them... Sheer ignorant incompetence.

The problem with the comic strip drawing is that it could be interpreted as meaning things associated with the trefoil take away sickness and sadness if you read the pictures in the wrong order.