incisura
noun
in·ci·su·ra
ˌin-ˌsī-ˈzhu̇r-ə 
ˌin(t)-sə-
ˌin(t)-sə-
plural incisurae
-ē
1
: a notch, cleft, or fissure of a body part or organ
2
: a downward notch in the curve recording aortic blood pressure that occurs between systole and diastole and is caused by backflow of blood for a short time before the aortic valve closes
Cite this Entry
“Incisura.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/incisura. Accessed 4 Nov. 2025.
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