Occasionally accessory bones are found in the carpus, but of more than 20 such described bones, only four (the central, styloid, secondary trapezoid, and secondary pisiform bones) are considered to be proven accessory bones. Sometimes the scaphoid, triquetrum, and pisiform bones are divided into two.
perforce definition: by or through necessity; necessarilyOrigin of perforceMiddle English par force from OFr: see per and force...
Dictionary. Definition of permeable. allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by waterSee Also: leaky, pervious. See Also: leaky, pervious. 1  allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by water.ee Also: leaky, pervious. 1  allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by water.