petechia

from WordNet (r) 3.0 (2006)

petechia
    n 1: a minute red or purple spot on the surface of the skin as
         the result of tiny hemorrhages of blood vessels in the skin
         (as in typhoid fever)

from The Collaborative International Dictionary of English v.0.48

Petechiae \Pe*tech"i*[ae]\, n. pl.; sing. {Petechia}. [NL., fr.
   LL. peteccia; cf. F. p['e]t['e]chie, It. petecchia, Sp.
   petequia, Gr. pitta`kion a label, plaster.] (Med.)
   Small crimson, purple, or livid spots, like flea-bites, due
   to extravasation of blood, which appear on the skin in
   malignant fevers, etc.
   [1913 Webster]