Brachium
/ˈbrɑː.ki.əm/noun
A Latin word meaning "arm," especially the upper arm.
Did you know?Latin *brachium* is the source of scientific terms like *brachial* and *brachiopod*, and it ultimately traces back to a Proto-Indo-European root meaning “arm,” showing how anatomy words can survive for millennia.
Etymological Timeline
Proto-Indo-European
PIE
*mregʰ- / *bherǵʰ-
“A prehistoric Indo-European root for “arm” is reconstructed in scholarship, though the exact form is debated.”
Classical Latin
Latin
brachium
“Arm; upper arm; by extension, a branch-like arm or limb.”
Late Latin
Latin
brachium
“Arm; arm of a cross; a branch or arm-like extension.”
Old French
Old French
braci
“Arm; forearm; arm-like part.”
Middle English
English
brac(h)
“A brace, support, or arm-like structure in technical uses.”
Modern English
English
brachial
“Relating to the arm, especially the upper arm.”