anti-sunward

adverb
an·ti-sun·ward | \ ¦an-tī-¦sən-wərd , ¦an-tē- \
variants: or antisunward

Definition of anti-sunward 

astronomy

: away from the sun : in the direction of the anthelion The most prominent optical feature of C/LINEAR was the tail of dust extending antisunward of the predicted position of the nucleus, which is also nearly due east. —H. A. Weaver et al., Science, 18 May 2001

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Other words from anti-sunward

anti-sunward or antisunward adjective
These forces accelerate the ions rapidly in the anti-sunward direction, producing the narrow tails often seen in comets. —Daniel Boice et al., Encyclopedia of the Solar System, 1999

First Known Use of anti-sunward

1974, in the meaning defined above

History and Etymology for anti-sunward

antisun + -ward entry 2

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The first known use of anti-sunward was in 1974

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