Scrabble?! AUTOTOXIC

Definitions of AUTOTOXIC in various dictionaries:

Autotoxicity is a biological phenomenon whereby a species inhibits growth or reproduction of members of that same species through the production of chemicals that are released into the environment. It is related to allelopathy but is technically different: autotoxicity means self-toxicity, and allelopathic effects refer to the effects of chemical compounds from one species on another after release into the environment; also, autotoxic effects are always inhibitory, whereas allelopathic effects are not necessarily inhibitory - they may stimulate other organisms.This mechanism will result in reduced competition between members of the same species. Inhibition on the growth of other plants will increase the availability of nutrients. In cultivation, autotoxicity can make it difficult or impossible to grow the same species after harvest of a crop. For example, this is known in alfalfa and the tree Cunninghamia lanceolata Other species displaying autotoxicity include the rush Juncus effusus and the grass Lolium rigidum.