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“helioscope”
helioscope
A telescope with a great focal length that receives images of the sun from plane mirrors attached to it; so, the viewer's eyes are protected from the sun's glare.
This entry is located in the following units:
helio-, heli-
(page 4)
scopo-, scop-, scept-, skept-, -scope-, -scopy, -scopia, -scopic, -scopist
(page 13)