recedent
/rɪˈsiːd(ə)nt/adjective
1That recedes; sloping backwards; retreating; regressive.
2 Ecology. Designating or relating to a species that constitutes only a small proportion of the individuals in a community.
Origin
Late 18th century (in an earlier sense). From classical Latin recēdent-, recēdēns, present participle of recēdere.