• rectus femoria,
• rectus femoris,
• rectus femorous,
• rectus fmeoris,
• rectus femomi,
• recus femoris,
• rectis femoris

The adjective form of the term "rectus femoris" is "rectus femoris". In anatomical terms, the word "rectus femoris" is used to describe a specific muscle in the human body, which is part of the quadriceps muscle group located in the thigh. While it is possible to refer to this muscle as "rectus femoral," the more common and accepted adjective form is "rectus femoris".

The plural form of "rectus femoris" is "recti femoris".

The singular form of the word "rectus femoris" is "rectus femoris". The term refers to a single muscle in the human body and does not change when used in its singular form.