A system of sexual reproduction in which one gamete (called the egg) is large and nonmotile, while the other (called the sperm) is small and motile. Oogamy is a type of heterogamy.
(biology) A form of anisogamy (heterogamy) in which the female gamete (e.g. egg cell) is significantly larger than the male gamete (sperm) and is non-motile.
Origin of oogamy
oo- + -gamy
Oogamy Sentence Examples
Reproduction by conjugation is also known as isogamy, by fertilization as oogamy.
Again, among Siphonales only one family (Vaucheriaceae)has reached the stage of oogamy, although an incipient heterogamy is said to occur in two other families (Codiaceae, Bryoosidaceae).
Among Confervales there is no family in which sexual reproduction - isogamy or oogamy - is not known to occur among some of the component species, and as many as four families (Cylindrocapsaceae, Sphaeropleaceae, Oedogoniaceae, Coleochaetaceae) are oogamous.
The reproduction of Characeae is characterized by a pronounced oogamy, the reproductive organs being the most highly differentiated among Chlorophyceae.