Initialism of planed all round: of timber, planed on all sides as opposed to rough sawn.

present participle of par

simple past tense and past participle of par

On a level; in the same condition, circumstances, position, rank, etc.; equal.

Alternative form of on a par

(entomology) a neurosecretory center of the insect brain, located along the anterior midline.

(anatomy) The distal part of the adenohypophysis, which contains the majority of its hormone-secreting cells.

(anatomy) The larger and more robust region of the tympanic membrane, consisting of three layers: skin, fibrous tissue, and mucosa.

(anatomy) Part of the anterior lobe of the pituitary gland, which wraps the pituitary stalk in a highly vascularized sheath.

(anatomy) A region constituting the majority of the posterior pituitary, and serving as the storage site of oxytocin and vasopressin.