Main Entry:

ephem·er·is

Pronunciation:

\-mə-rəs\

Function:

noun

Inflected Form(s):

plural eph·e·mer·i·des \ˌe-fə-ˈmer-ə-ˌdēz\

Etymology:

Latin, diary, ephemeris, from Greek ephēmeris, from ephēmeros

Date:

1508

: a tabular statement of the assigned places of a celestial body for regular intervals