13-Letter Words Containing: _,A,A,O,X

• a monoamine oxidase inhibitor (trade name Marplan) that is used to treat clinical depression

• the mathematical process of finding the maximum value of a function

• the act of raising to the highest possible point or condition or position

• 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.

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

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

• a group of viruses including those causing mumps and measles

• The fused head and thorax of spiders and crustaceans

• (of quantities) imprecise but fairly close to correct