/ (ˈpɛrɪˌsɛntə) /
the point in an elliptical orbit that is nearest to the centre of mass of the system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for pericentre
Starting from the pericentre, it is completed on the return to the pericentre.
In astronomy the word denotes the angular distance of a body from the pericentre of the orbit in which it is moving.