13-Letter Words Containing: A,L,T,H,O,_

• Any of various typically yellow-brown dinoflagellates (originally grouped as genus Zooxanthella) now assigned to the genera Symbiodinium and Amphidinium, notably found in coral reefs.

• To introduce a hydroxyl group into a compound

• cause to adopt Catholicism

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

• abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A

• 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 sexual attraction to (or sexual relations with) persons of the same sex