Each country in the European Union has its own definition of a forest and the European Commission has defined forestland as having at least 20% canopy closure (10% in the Mediterranean forests) and a minimum area of 0.5 ha. (1 ha. = 0.01 kmÂ²). Elsewhere, the definition of a tree can vary.
Lunula: the crescent-shaped area at the base of the human fingernail.
â¢The whitish crescent on the nail is called the lunula (little moon).â¢A portion of the skin grows onto the nail body and is called the cuticle. 11 â¢If the wound covers an extensive area or involves a region covered by thin skin, the dermal repair must be underway before epithelial cells can cover the surface.