al·le·lop·a·thy 
(ə-lē-lŏpə-thē, ăl′ə-)
(ə-lē-lŏpə-thē, ăl′ə-)n.
A usually negative effect on the growth or development of an organism of one species, caused by a chemical released by an organism of another species. Usually used of plants.
[Greek allēlōn, reciprocally (from allos, another; see al-1 in the Appendix of Indo-European roots) + -PATHY.]
al·le′lo·pathic (ə-lē′lə-păthĭk, ə-lĕl′ə-) adj.
- representation
- representational
- representationalism
- representative
- representatively
- representativeness
- representer
- re-press
- repress
- repressed memory
- represser
- repressibility
- repressible
- repression
- repressionist
- repressive
- repressively
- repressiveness
- repressor
- reprievable
- reprieve
- reprimand
- reprint
- reprinter
- reprisal