Icelandic edit

 
Sorturák (“linea nigra”).
 
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Etymology edit

From sortu- (black) +‎ rák (a streak, a strike) where sortu (of or pertaining to the colour black) is the genitive of sorta (a black colour, a black dye).

Noun edit

sorturák f (genitive singular sorturákar, nominative plural sorturákir)

  1. (anatomy) a linea nigra, (a dark vertical line about a centimeter in width that appears on the abdomen during about three quarters of all pregnancies)

See also edit