Search Result for "prostaglandin": 
Wordnet 3.0

NOUN (1)

1. a potent substance that acts like a hormone and is found in many bodily tissues (and especially in semen); produced in response to trauma and may affect blood pressure and metabolism and smooth muscle activity; 



WordNet (r) 3.0 (2006):

prostaglandin
    n 1: a potent substance that acts like a hormone and is found in
         many bodily tissues (and especially in semen); produced in
         response to trauma and may affect blood pressure and
         metabolism and smooth muscle activity