TRIVALVE
Meaning of TRIVALVE in English
/truy"valv'/ , adj.
1. having three valves, as a shell.
n.
2. a trivalve shell.
[ 1675-85; TRI- + VALVE ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012