mo·nog·y·ny 
(mə-nŏjə-nē)
(mə-nŏjə-nē)n.
1. The practice or condition of having only one wife at a time.
2. Zoology
a. A mating pattern in which a male mates with one female in a single breeding season.
b. The condition of having only one queen. Used of an insect colony.
mo·nogy·nist n.
mo·nogy·nous adj.