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

pla·cen·ta

(plə-sĕntə)

n. pl. pla·cen·tas or pla·cen·tae (-tē)

a. A membranous vascular organ that develops in female eutherian mammals during pregnancy, lining the uterine wall and partially enveloping the fetus, to which it is attached by the umbilical cord. Following birth, the placenta is expelled.

b. A similar organ in marsupial mammals, consisting of a yolk sac attached to the uterine wall.

c. An organ with similar functions in some nonmammalian animals, such as certain sharks and reptiles.

2. Botany The part within the ovary of a flowering plant to which the ovules are attached.

[New Latin, from Latin, flat cake, alteration of Greek plakoenta, from accusative of plakoeis, flat, from plax, plak-, flat land, surface; see plāk-¹ in the Appendix of Indo-European roots.]

pla·cental adj.

单词	placenta
释义	pla·cen·ta (plə-sĕntə) n. pl. pla·cen·tas or pla·cen·tae (-tē) 1. a. A membranous vascular organ that develops in female eutherian mammals during pregnancy, lining the uterine wall and partially enveloping the fetus, to which it is attached by the umbilical cord. Following birth, the placenta is expelled. b. A similar organ in marsupial mammals, consisting of a yolk sac attached to the uterine wall. c. An organ with similar functions in some nonmammalian animals, such as certain sharks and reptiles. 2. Botany The part within the ovary of a flowering plant to which the ovules are attached. [New Latin, from Latin, flat cake, alteration of Greek plakoenta, from accusative of plakoeis, flat, from plax, plak-, flat land, surface; see plāk-¹ in the Appendix of Indo-European roots.] pla·cental adj.
随便看	resistibly resistive resistively resistiveness resistivity resistless resistlessly resistlessness resistor res judicata resole resolubility resoluble resolute resolutely resoluteness resolution resolvability resolvable resolvableness resolve resolvedly resolvent resolver resonance