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hexiology (n.)

"history of the development and behavior of living beings as affected by their environment," 1882, coined by English biologist St. George Jackson Mivart (1827-1900) from Greek hexis "a state or habit," from ekhein "to have, hold;" in intransitive use, "be in a given state or condition" (from PIE root *segh- "to hold").

Every living creature has also relations with other living creatures, which may tend to destroy it, or indirectly to aid it, and the various physical forces and conditions exercise their several influences upon it. The study of all these complex relations to time, space, physical forces, other organisms, and to surrounding conditions generally, constitutes the science of hexicology (hexiology?). [Mivart]