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nounwarm-blooded vertebrates characterized by mammary glands in the female
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Definition that contains mammalia
- mammalian of or relating to the class Mammalia
- urea the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
- carbamide the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
- kenogenesis introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution)
- zona pellucida thick membrane around the mammalian ovum; can be penetrated by one sperm in the fertilization process; usually remains around the fertilized egg until it is implanted in the wall of the uterus
- vesicula umbilicus membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
- umbilical vesicle membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
- estronol a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency
- cenogenesis introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution)
- vitelline sac membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional