A child begins to pull toys from her toy box, and, in so doing, she sorts them into separate piles of cars, trucks, and animals. She also understands that some toys can be switched from one pile to another or can form new piles based on subtypes having similar colors. This behavior is called and is characteristic of the concrete operational stage of development.

Adnexa is a word that literally means and is applied chiefly to refer to the appendages of the eye. an antrum is a _sinuscavity_, especially within a bone. the term asthenopia means a condition of in the an astrocytoma is a consisting of hypercrinia refers to of any endocrine gland. dacryogenic pertains to the of dura means and is used as a shortened form or duramater, the outer covering of the brain. the word fascia is used to denote a of fibrous tissue. heliosensitivity denotes to the hypnology is the of the term isocellular refers to the composition of cells of the size or kind. a laparogastrostomy is the creation of a permanent to the through the wall. the term malignant is used to mean something demetia is a general term for deterioration. the term oculopathy refers to any of the prepartak means occurring just the term podalic denotes being accomplished by means of the a mastoscirrhus is a cancer of the sclerosis is a of a septum is a general term to designate a dividing a sinus is a in the body the term somatopathy denotes a as distinguished from a mental one. tarsus pertains to the region of the foot. the term topalgia denotes trachelomyitis is an of the within the