Sentence:  After the construction of the waterway between the Eastern Mediterranean and the Gulf of Suez – the Suez Canal – in 1869, hundreds of Erythrean species traversed the channel and settled in the Mediterranean. This process is called <WSD>Lessepsian</WSD> migration, after Ferdinand Marie de Lesseps, the French diplomat and engineer who built the canal. <WSD>Lessepsian</WSD> migration is considered to be an important factor in the increase of Mediterranean fish diversity. 
Meaning of the word marked with <WSD> tags:  Of or relating to organisms that migrate from the Red Sea to the eastern Mediterranean Sea by means of the Suez Canal.