Share this entry

geitonogamy Syllabification: gei·to·nog·a·my
Pronunciation: /ˌɡītnˈäɡəmē/

Definition of geitonogamy in English:


The fertilization of a flower by pollen from another flower on the same (or a genetically identical) plant. Compare with xenogamy.
Example sentences
  • Both species use a mixed breeding system, consisting of xenogamy, geitonogamy, and autogamy; agamospermy is unimportant.
  • Protogyny may also reduce geitonogamy if the flowers on an inflorescence develop so that all open flowers are in either male or female phase at any given time.
  • Inefficient beetle-pollination and the automimicry system via asynchronous flowering might be responsible for the high level of pollen shortage and frequent geitonogamy.


Late 19th century: from Greek geitōn, geitono- 'neighbor' + -gamos 'marrying'.



Example sentences
  • Consequently, it reduces male fitness because geitonogamous pollen grains are barred from fertilizing ovules.
  • Comparing intact and emasculated flowers open on the same plant on the same day will underestimate autogamy, because emasculation of one flower potentially reduces the geitonogamous pollen received by the other.
  • This indicates that frequent geitonogamous selfing occurs.

Definition of geitonogamy in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day luxe
Pronunciation: ləks
expensive and of high quality; luxurious