The bony matter which unites the ends of fractured bones.

【解】骨痂；接骨质。

A thick, hard place on the skin.

胼胝；皮肤硬化、加厚的地方。

The protective covering formed over the cut or wounded surface of a plant.

【植】(植物茎上割破处之)新生保护质；愈合组织。

To form callus; to cause callus to form on.

(使)形成骨痂或胼胝。