• Chambers's Twentieth Century Dictionary
    • adj Retro-operative rē-trō-op′e-rā-tiv retrospective in effect.
    • ***


In news:

Over 90 years as Europe's oldest continuously operating motorcycle manufacturer makes Moto Guzzi's V7 lineup the most unique among today's modern retro motorcycles.

In science:

Thim thank for support provided by NASA of the retro-active analysis WFPC2 photometry zero-points through grant HST-AR-09216.01A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. B.
Cepheid Distances to SNe Ia Host Galaxies based on a Revised Photometric Zero-Point of the HST-WFPC2 and New P-L Relations and Metallicity Corrections