The new formation over the end of a cutting, before it puts out rootlets.
A shining area on the frons of many species of Tabanomorpha (horse flies and relatives).
The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece.
A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
To form such hardened tissue.
An opening in anything made by breaking or parting.
A vacancy, deficit, absence, or lack.
The shortfall between the amount the medical insurer will pay to the service provider and the scheduled fee for the item.
A hiatus, a pause in something which is otherwise continuous.
An opening allowing passage or entrance.
An opening that implies a breach or defect.
(usually written as "the gap") The disparity between the indigenous and non-indigenous communities with regard to life expectancy, education, health, etc.
An unsequenced region in a sequence alignment.
The regions between the outfielders.
A vacant space or time.
A mountain or hill pass.
A sheltered area of coast between two cliffs (mostly restricted to place names).
To leave suddenly.
To notch, as a sword or knife.
To check the size of a gap.
To make an opening in; to breach.