The Collaborative International Dictionary
Water shield
Water shield \Wa"ter shield`\ (Bot.) An aquatic American plant ( Brasenia peltata) having floating oval leaves, and the covered with a clear jelly.
Usage examples of "water shield".
To cut it short, at 3:11 today, while on watch, I saw Harper, with no apparent reasonable purpose in mind, pick up a wrench used only for operating the valves of the water shield and approach the trigger.