A toothed bar fitted to a tractor

plural of toothbar

Dissostichus eleginoides, a commercially exploited, cold-water fish of the southern hemisphere.

Alternative form of elephant's toothpaste

A foamy substance caused by the rapid decomposition of hydrogen peroxide using potassium iodide as a catalyst; the outcome of a popular educational experiment in chemistry.

plural of ionic toothbrush

A kind of electric toothbrush that releases ions, causing the teeth to repel plaque.

(informal) A Bowie knife.

Alternative form of you can't put the toothpaste back in the tube

Once something is said or done, it cannot be unsaid or undone.