popliteal
adjective
pop·li·te·al ˌpä-plə-ˈtē-əl 
also
pä-ˈpli-tē-əl : of or relating to the back part of the leg behind the knee joint
Example Sentences
Recent Examples on the Web The manner of Guild’s death was natural and the causes were pulmonary thromboembolus, a blood clot in the lung, and a thrombus in the left popliteal vein, a vein in the leg, according to the coroner. 
Matt Sledge, NOLA.com, 18 Oct. 2020 And so the Paralympian — who was born with popliteal pterygium syndrome and is a double above-knee amputee — took him up on the offer. Lindsay Kimble, PEOPLE.com, 14 Aug. 2020 The popliteal artery is behind the knee, and is the one damaged. Profootballdoc, sandiegouniontribune.com, 30 Oct. 2017
Matt Sledge, NOLA.com, 18 Oct. 2020 And so the Paralympian — who was born with popliteal pterygium syndrome and is a double above-knee amputee — took him up on the offer. Lindsay Kimble, PEOPLE.com, 14 Aug. 2020 The popliteal artery is behind the knee, and is the one damaged. Profootballdoc, sandiegouniontribune.com, 30 Oct. 2017 Word History
Etymology
New Latin popliteus, from Latin poplit-, poples knee joint, back of the knee
First Known Use
1754, in the meaning defined above
Medical Definition
popliteal
adjective
pop·li·te·al
ˌpäp-lə-ˈtē-əl also päp-ˈlit-ē-
: of or relating to the back part of the leg behind the knee joint