Medical Definition of Head kidney

1. 1. The definitive excretory organ of primitive fishes. Synonym: head kidney. 2. In the embryos of higher vertebrates, a vestigial structure consisting of a series of tortuous tubules emptying into the cloaca by way of the primary nephric duct; in the human embryo, the pronephros is a very rudimentary and temporary structure, followed by the mesonephros and still later by the metanephros. Synonym: forekidney, primordial kidney. Origin: pro-+ G. Nephros, kidney (05 Mar 2000)

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Lexicographical Neighbors of Head Kidney

head gate
head girl
head group
head groups
head hair
head hairs
head home
head honcho
head honchos
head house
head hunter
head hunters
head in the clouds
head injuries
head injury
head kidney (current term)
head lettuce
head line
head linesman
head louse
head man
head mans
head men
head mirror
head movements
head nurse
head of epididymis
head of femur
head of fibula

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