An Etymological Dictionary of Astronomy and Astrophysics

A constituent part; an individual part of an organized whole.
One of two or more vectors having a sum equal to a given vector.

Etymology (EN): L. componentem, pr.p. of componere “to put together,” → compose.

Etymology (PE): Hamneh from ham- “together,” → com- + neh present tense stem of nehâdan “to put, place,” → compose.