| PLA | the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus |
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| PLA | that part of the ovary of a flowering plant where the ovules form |
| PLA | pregnancy in which the placenta is implanted in the lower part of the uterus (instead of the upper part) |
| PLA | mammals having a placenta |
| PLA | of or having or occurring by means of a placenta |
| PLA | mammals having a placenta |
| PLA | arrangement of the ovules in the placenta and of the placentas in the ovary |
| PLA | the formation of the placenta in the uterus |
| PLA | an alluvial deposit that contains particles of some valuable mineral |
| PLA | mining valuable minerals from a placer by washing or dredging |
| PLA | (British) a disparaging term for an appointee |
| PLA | free from disturbance |