Medical Definition of oblique fissure
: either of two fissures of the lungs of which the one on the left side of the body separates the superior lobe of the left lung from the inferior lobe and the one on the right separates the superior and middle lobes of the right lung from the inferior lobe
Seen and Heard
What made you want to look up oblique fissure? Please tell us where you read or heard it (including the quote, if possible).