14/09/2022
The words that start with the prefix "actino-" pertain to rays, beams! This is because this prefix comes from the singular genitive case of the ancient Greek noun "ἀκτίς"(aktis)[ah-ktEEss]=ray, radius, beam, which is "ἀκτίνος"(aktinos)[ah-ktEE-nos]=of the ray or beam! Such words are: actinomycetes=ἀκτίνος+μύκητες, actinomorphy=ἀκτίνος+μορφή(form, shape), actinometric=ἀκτίνος+μετρικό, actinoid=ἀκτίνος+εἶδος, and others!
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