English
N-terminus
From N- + terminus.
Proto-Indo-European *térmn̥ ‘boundary, end’
Proto-Italic *termn̥ ‘boundary stone’
Proto-Italic *term(e)nos ‘boundary stone’
Latin terminus ‘boundary, limit’
English terminus
Today it means
noun The end of a polypeptide chain that consists of an amino acid with a free amino group.
Language periods are conventional ranges, not dates for this word.
Etymograph / N-terminus