The Collaborative International Dictionary
Concentering
Concenter \Con*cen"ter\, Concentre \Con*cen"tre\, v. i. [imp. & p. p. Concentered or Concentred; p. pr & vb. n. Concenteringor Concentring.] [F. concentrer, fr. L. con- + centrum center. See Center, and cf. Concentrate] To come to one point; to meet in, or converge toward, a common center; to have a common center.
God, in whom all perfections concenter.
--Bp.
Beveridge.
Wiktionary
concentering
vb. (context American spelling English) (alternative spelling of concentring nodot=t English); (present participle of concenter nocap=t English)