Any of various jumping plant lice of the family Psyllidae, especially of the genus Psylla, which includes several species that infest fruit trees.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "psylla" in a sentence
"French, literally, flea, from Old French pulce, from Latin pulic-, pulex — more at psylla"
"And this has not one psylla to do with the reincarnation, as I like to call it, that CNN is going through."
"_ -- The psylla is one of the most serious insects affecting the pear tree."