Adjective
Of or pertaining to Pelusium, an ancient city of Egypt; as, the Pelusiac (or former eastern) outlet of the Nile.
Source: Webster's dictionaryTwo hundred years after the construction of Ptolemy's canal, Cleopatra seems to have had no west–east waterway passage, because the Pelusiac branch of the Nile, which had fed Ptolemy's west–east canal, had by that time dwindled, being choked with silt. Source: Internet