Cloverleaf

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Cloverleaf

A gravitationally lensed image of a very distant quasar (redshift 2.56) in the form of four images separated by about 1 arc second. The lensing galaxy has not yet been detected and may itself lie at comparatively high redshift. See gravitational lens.

cloverleaf

[′klō·vər‚lēf]
(civil engineering)
A highway intersection resembling a clover leaf and designed to allow movement and interchange of traffic without direct crossings and left turns.