英语词汇“placentation”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

WORD FAMILY

placenta: placentae, placental, placentas, placentation+/placental: placentals, transplacental

USAGE EXAMPLES

The disjunction or dialysis of the carpels, for instance, frequently renders axile placentation marginal.

Masters, Maxwell T., Vegetable Teratology—An Account of...(2010)

In the flowers of Saponaria officinalis Dr. Masters has observed instances of both marginal and free central placentation.

Darwin, Charles, The Origin of Species by means of N...(2010)

In malformed flowers of Digitalis the change from axile to parietal placentation may often be seen.

Masters, Maxwell T., Vegetable Teratology—An Account of...(2010)

1n the formation of the placenta in the uterus

Hyper

activity, bodily function, bodily process, body process

an organic process that takes place in the body

2n arrangement of the ovules in the placenta and of the placentas in the ovary

Hypo|Hyper

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

reproductive structure

the parts of a plant involved in its reproduction

单词	placentation
释义	placentation (once / 218877 pages) n WORD FAMILY placenta: placentae, placental, placentas, placentation+/placental: placentals, transplacental USAGE EXAMPLES The disjunction or dialysis of the carpels, for instance, frequently renders axile placentation marginal. Masters, Maxwell T., Vegetable Teratology—An Account of...(2010) In the flowers of Saponaria officinalis Dr. Masters has observed instances of both marginal and free central placentation. Darwin, Charles, The Origin of Species by means of N...(2010) In malformed flowers of Digitalis the change from axile to parietal placentation may often be seen. Masters, Maxwell T., Vegetable Teratology—An Account of...(2010) 1n the formation of the placenta in the uterus Hyper activity, bodily function, bodily process, body process an organic process that takes place in the body 2n arrangement of the ovules in the placenta and of the placentas in the ovary Hypo\|Hyper 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 reproductive structure the parts of a plant involved in its reproduction
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