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fo
holy water
arthur conan doyle
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pique
pigeon-pea plant
guardian
ephemeropteran
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concurrent operation
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FO
FO
/ef oʊ/
noun
(military) an officer holding the rank of major or lieutenant colonel or colonel
(
field officer
,
field-grade officer
,
FO
)
(military) an officer holding the rank of major or lieutenant colonel or colonel
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