Adjective
(obsolete, rare) Pertaining to the French diplomat Ferdinand de Lesseps, who designed the Suez Canal.
(marine biology) Of or relating to organisms that migrate from the Red Sea to the eastern Mediterranean Sea by means of the Suez Canal.
Source: en.wiktionary.orgThe impacts of some lessepsian species have proven to be considerable mainly in the Levantine basin of the Mediterranean, where they are replacing native species and becoming a "familiar sight". Source: Internet
While not as intense as the "lessepsian" movement, the process may be scientific interest and may therefore warrant increased levels of monitoring. Source: Internet