As far as I know, " flection" and "flexion" are synonymous. I have two questions:

1- Are the two words of the same origin?

2- Which one is more modern?

1 Answer 1


The Oxford English Dictionary puts both spellings under the same heading, so yes, they are synonymous. Here's how the OED explains the two spellings:

The etymological spelling flexion is the original in English; flection (first in 18th cent.) is due to the influence of such words as affection, direction, etc.

Additionally, "flexion" is a word in other languages while the more recent spelling "flection" is unique to English.

  • 3
    Flexion is not a word in Latin, though it is the stem used for declining one: the nominative is flexiō with no n. Apr 4, 2017 at 22:23
  • You're completely right, I just edited my answer to fix the error. Apr 4, 2017 at 22:25

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