Examples from the Web for parasitical
The dodder is what is called a parasitical plant; that is, a plant that lives entirely on another.Woodside|Caroline Hadley
The Fourth Power is parasitical to the three others; and lives upon their life, without any separate existence.Prose Masterpieces from Modern Essayists|James Anthony Froude, Edward A. Freeman, William Ewart Gladstone, John Henry Newman and Leslie Stephen
Folius was growing on the rosewood Acacia, and the branches of Eucalypti were inhabited by the parasitical orange loranth.Journal of an Expedition into the Interior of Tropical Australia|Thomas Mitchell
Because the mistletoe is a parasitical plant, growing upon the bark of other trees.The Reason Why|Anonymous
The tribes of mosses, lichens, and liver-worts, are all parasitical; it is doubted whether the ivy is or not.Woodland Gleanings|Charles Tilt
Word Origin and History for parasitical
1620s, from Latin parasiticus, from Greek parasitikos "of or pertaining to a parasite; the trade of a parasite," from parasitos (see parasite). Biological sense is from 1731. Related: Parasitical, 1570s in reference to toadies; from 1640s in the biological sense.