PLACENTATION

• PLACENTATION (noun)
  The noun PLACENTATION has 2 senses:

1. the formation of the placenta in the uterus
2. arrangement of the ovules in the placenta and of the placentas in the ovary

  Familiarity information: PLACENTATION used as a noun is rare.

• PLACENTATION (noun)

Meaning:

The formation of the placenta in the uterus

Classified under:

Nouns denoting natural processes

Hypernyms ("placentation" is a kind of...):

activity; bodily function; bodily process; body process (an organic process that takes place in the body)

Meaning:

Arrangement of the ovules in the placenta and of the placentas in the ovary

Classified under:

Nouns denoting plants

Hypernyms ("placentation" is a kind of...):

reproductive structure (the parts of a plant involved in its reproduction)

Hyponyms (each of the following is a kind of "placentation"):

apical placentation (where one or few ovules develop at the top of a simple or compound ovary)

axile placentation (ovules are borne at or around the center of a compound ovary on an axis formed from joined septa)

basal placentation (where one or few ovules develop at the base of a simple or compound ovary)

free central placentation (where ovules develop on a central column in a compound ovary lacking septa or with septa at base only)

lamellate placentation (with ovules on thin extensions of the placentae into a compound ovary)

marginal placentation; ventral placentation (with ovules borne on the wall along the ventral suture of a simple ovary)

parietal placentation (where ovules develop on the wall or slight outgrowths of the wall forming broken partitions within a compound ovary)