13-Letter Words Containing: T,H,E,C,A,L

• A coffee klatch.

• a chemical substance obtained from plants that is biologically active but not nutritive

• The fused head and thorax of spiders and crustaceans

• An evolutionary trend in which the neural and sense organs become centralized at one end (the head) of an animal.

• The redistribution of blood flow from the base of the lung towards the upper lobe vessels as a consequence of pulmonary venous hypertension, usually described on a chest radiograph.

• a disorder characterized by an abnormal increase in the number of red blood cells in the blood

• of or relating to or produced by the effects of light on chemical systems