cir·ca·di·an 
(sər-kādē-ən, -kădē-, sûr′kə-dīən, -dē-)
(sər-kādē-ən, -kădē-, sûr′kə-dīən, -dē-)adj.
Biology
Biology
Relating to or exhibiting approximately 24-hour periodicity.
[Latin circā, around; see CIRCA + Latin diēs, day; see dyeu- in the Appendix of Indo-European roots.]
cir·cadi·an·ly adv.
- percolation
- percolator
- per contra
- percurrent
- percuss
- percussion
- percussion cap
- percussion instrument
- percussionist
- percussive
- percussively
- percussiveness
- percutaneous
- percutaneous coronary intervention
- percutaneously
- Percy
- Percy
- Percy Bysshe
- Percy Lavon
- (Percy) Wyndham
- per diem
- perdition
- perdu
- perdue
- perdurability