petechia
noun
pe·te·chia pə-ˈtē-kē-ə 
plural petechiae pə-ˈtē-kē-ˌī
: a minute reddish or purplish spot containing blood that appears in skin or mucous membrane as a result of localized hemorrhage
petechial
pə-ˈtē-kē-əl
adjective 
Example Sentences
Recent Examples on the Web Bruising is a common sign of ITP, as are symptoms like petechiae (small dots of blood that look like a skin rash), sudden bloody noses, gums that bleed out of nowhere, and more, according to the National Heart, Lung, and Blood Institute (NHLBI). 
Patia Braithwaite, SELF, 21 June 2019 Although petechiae can be a sign of leukemia, it can also be caused by things like a bad cough or sunburn, according to the Mayo Clinic. Lindsey Bever, Washington Post, 24 Feb. 2018 Those dots, little bits of blood trapped beneath the skin, known as petechiae, suggested that there was something wrong with her platelets, the components of blood that initiate clotting. Lisa Sanders, M.d., New York Times, 16 Mar. 2017
Patia Braithwaite, SELF, 21 June 2019 Although petechiae can be a sign of leukemia, it can also be caused by things like a bad cough or sunburn, according to the Mayo Clinic. Lindsey Bever, Washington Post, 24 Feb. 2018 Those dots, little bits of blood trapped beneath the skin, known as petechiae, suggested that there was something wrong with her platelets, the components of blood that initiate clotting. Lisa Sanders, M.d., New York Times, 16 Mar. 2017 Word History
Etymology
New Latin, from Italian petecchia, ultimately from Latin impetigo
First Known Use
circa 1784, in the meaning defined above
Medical Definition
petechia
noun
pe·te·chia pə-ˈtē-kē-ə
plural petechiae -kē-ˌī
: a minute reddish or purplish spot containing blood that appears in skin or mucous membrane as a result of localized hemorrhage