Word Study
circum-
CIDE DICTIONARY
circum-, [Akin to circle, circus.].
A Latin preposition, used as a prefix in many English words, and signifying around or about. [1913 Webster]
OXFORD DICTIONARY
circum-, comb. form round, about, around, used:
1 adverbially (circumambient; circumfuse).
2 prepositionally (circumlunar; circumocular).
1 adverbially (circumambient; circumfuse).
2 prepositionally (circumlunar; circumocular).
Etymology
from or after L circum prep. = round, about
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