1) The state of being homogamous 
[biology] Homogamy is used in biology in three separate senses: ...[sociology] Homogamy is marriage between individuals who are, in some culturally important way, similar to each other. Homogamy may be based on socioeconomic status, class, gender, ethnicity, or religion, or age in the case of the so-called age homogamy. It is a form of assortative mating. It can also refer to the socialization customs of a...
• (n.) The condition of being homogamous.
marriage between people with the same social characteristics
<botany> The condition in a flowering plant species of having only one type of flower - one which produces both male and female parts in the same flower. ... Compare: heterogamy. ... (11 Jan 1998) ... 
Ho·mog'a·my noun (Botany) The condition of being homogamous. 
Type: Term Pronunciation: hō-mog′ă-mē Definitions: 1. Similarity of husband and wife in a specific trait.
homogamy, homogamous 1. Fertilization of a flower by its own pollen or by that of another flower on the same plant. 2. The simultaneous maturation of male and female reproductive organs in a flower or hermaphrodite organism. 3. Applied to flowers in which the stamens and pistils ripen together. 4. The condition of a plant producing only one kind o...
the state of being homogamous. · interbreeding of individuals with like characteristics.