Definition of "hydrilla" []

• A submersed Old World Plant (Hydrilla verticillata) having whorled, lance-shaped leaves and unisexual, solitary, axillary flowers. (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.

• "For example, when Dr. Melnick and his colleagues met recently with fishermen, they discussed the invasive plant hydrilla, which is choking the river leading into Laguna Limón, a once-valuable fishing resource, and the lagoon itself."
• "Somewhere along the way, invasive plant species such as hydrilla and giant salvinia took up residence, threatening to choke the lake and its creatures to death."
• ""New Zealand mud snails and plants such as hydrilla are on our radar screen," said Thayer."