spackling

verb

1. (form-of, gerund, participle, present)present participle and gerund of spackle

noun

1. Something used to spackle; a material that fills cracks or holes.

   “Bone also has a crack repair team, in every sense of the word: osteoclast cells that dig around the cracks, using acids to wipe away the old matrix, and osteoblast cells that migrate in and secrete fresh spacklings of bone.”