protrusion

He pulls aside another prisoner with a protrusion on his head, and implies the man was injured by the guards.

The mantle cavity is also closed with the exception of a small hole left for the protrusion of the small foot.

The hole in the shell serves for the protrusion of a pedicel or foot by means of which the animal is enabled to attach itself.

No doubt the protrusion of the cirri effectively aids the act of opening.

Perhaps I have blundered about Primula; but certainly not about mere protrusion of pollen-tubes.

The complication which makes the accident so unfortunate for the patient is the protrusion of the intestines.