placentation

placentation

美 [ˌplæsən'teɪʃən] 　英 [plæsen'teɪʃən]

• n.【动,解】胎盘形成；【植】胎座式
• 网络胎座型；胎盘生成；胚珠在子房

英汉解释

n.	1. 【动,解】胎盘形成 2. 【植】胎座式

英英解释

n.	1. the process of forming a placenta during pregnancy, or the way in which the placenta is attached to the wall of the uterus 2. the way in which ovules are attached to the ovary of a plant 3. the form, structure, or type of a placenta

例句

The trophoblast adhesion to the uterine wall is the requisite first step of implantation and, subsequently, placentation.

紧贴在子宫壁的滋养层是胚胎着床必不可少的步骤，随后形成胎盘。

ovules numerous; placentation axile. Styles 2. Capsule ovoid, globose, or ellipsoid, dehiscing longitudinally or irregularly; pericarp thin.

胚珠多数中轴胎座花柱2蒴果卵球形，球状，不规则的或椭圆形，纵向开裂或；

Ovary superior or inferior, placentation axile, rarely parietal, often many ovules per locule.

子房上位或者下位，中轴胎座，很少周壁胎座，通常每子房室很多胚珠。

The carpel closed toward and connected with the ovary central column to form axile placentation since mid October.

十月中旬起心皮向内合生并与中轴连合形成中轴胎座。

placentation axile, sometimes free central at fruit maturity.

中轴胎座，有时在成熟果的中心离生。

Anthers shorter than 4 mm, longitudinally dehiscent; ovules with parietal placentation near base of ovary.

花药短于4毫米，纵向开裂；子房的胚珠具侧膜胎座近基部。

ovules numerous, with free central placentation, longitudinal 5-fascicled.

胚珠许多，具特立中央胎座式，纵裂5。

anthers dorsifixed. Ovary placentation axile.

花药背着子房中轴胎座。

Match the numbers in front of the placentation type (A-D) with the corresponding diagram.

请将胎座式类型（A-D）与相应的图匹配起来。

placentation axile; ovules 2 to numerous, anatropous.

中轴胎座胚珠2到多数，倒生；

ovules 4 per locule, erect or pendulous, placentation axile.

胚珠4每室，直立或下垂，中轴胎座。

placentation parietal; styles (2 or)3-5(or 6), free or connate at base, persistent.

侧膜胎座花柱（2或）3-5（或6），离生或合生在基部，宿存。

placentation axile; ovules anatropous with a single integument, 10 or more per locule;

中轴胎座胚珠倒生，有单个珠被，每子房室有10个或更多的胚珠；

ovules 2 per locule, all but 1 aborting before maturity, placentation axile at top of a free basal placentation;

胚珠2每室，成熟前仅1可育，中轴胎座在一离生基生胎座式的顶的；

ovules with parietal placentation near base of ovary. Style short;

胚珠具在近子房基部的侧膜胎座花柱短柱头头状。

ovary inferior, 3-loculed, ovules usually 2 per locule (more than 2 in a few small genera), placentation axile;

子房下位，3室，通常每室2胚珠，（在少数小属内多于2个），中轴胎座；

Most cases of hemorrhage are related to uterine atony and abnormal placentation;

大多数情况下出血有关宫缩乏力和不正常的胎盘；

placentation axile; ovules numerous. Style 1, short;

中轴胎座胚珠多数花柱1，短；

placentation axile; ovules 2 per locule, pendulous;

中轴胎座每室2胚株，下垂；

placentation parietal; ovules numerous. Styles 2-6, free or connate only at base, divergent;

侧膜胎座胚珠多数花柱2-6，离生或合生只在基部，分叉；

placentation axile; ovules 2 to several per locule;

中轴胎座胚珠2到数个每室；

Styles (2 or)3[-5], free. Capsule valves obscurely longitudinally vittae; placentation parietal;

花柱（2或者）3[-5]，离生蒴果裂爿不清楚地纵向具油道的；

ovary 1-loculed, placentation laminar;

子房1室，片状胎座；

Ovary superior, (2- or)3-locular, placentation axile;

子房上位，（2-或）室，中轴胎座；

placentation axile, each locule with (1 or)2 to several ovules;

中轴胎座，子房每室有（1或者）2或几个胚珠；

Stamens numerous; anther dorsifixed. Ovary densely tomentose, 5-loculed with 2 or 3 ovules per locule, placentation axile;

雄蕊多数花药背着子房密被绒毛，5室的具2或3胚珠每室，中轴胎座；