early 15c., from Latin semicirculus (see semicircle) + -ar.
semi-
semi-annual
semi-arid
semi-automatic
semicircle
semicircular
semicolon
semiconductor
semiconscious
semi-demi-
semi-detached
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}