1
Stage 1 of 2
diaphragma
Greek · ancient
"a partition, a dividing wall"
literally a partition wall, from dia (across) and phragma (a fence)
2
Stage 2 of 2
diaphragm
English · 1400s
"the muscle separating the chest from the abdomen"
settled as the medical word for the muscle separating chest from abdomen
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