[ ih-see-sis ]
/ ɪˈsi sɪs /

noun Ecology.

the establishment of an immigrant plant in a new environment.

Origin of ecesis

1900–05; < Greek oíkēsis an inhabiting, equivalent to oikē-, variant stem of oikeîn to inhabit (derivative of oîkos house) + -sis -sis

Related forms

e·ce·sic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ecesis

British Dictionary definitions for ecesis


/ (ɪˈsiːsɪs) /


the establishment of a plant in a new environment

Word Origin for ecesis

C20: from Greek oikēsis a dwelling in, from oikein to inhabit; related to oikos a house
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012