You know what it looks like… but what is it called?
TAKE THE QUIZ“[primum]”
The following 2 entries include the term [primum].
primum mobile
noun: the outermost concentric sphere conceived in medieval astronomy as carrying the spheres of the fixed stars and the planets in its daily revolution
primum non nocere
Latin phrase: first, do no harm
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Merriam-Webster unabridged