Etymograph

English

semilength

From semi- + length.

Formed from semi- + length

Proto-Indo-European *sem- ‘one’

Proto-Indo-European *sēmi ‘half’

English semi-

Proto-Indo-European *dlongʰos ‘long’

…

Proto-Germanic *langiþō ‘longness’

Proto-West Germanic *langiþu ‘longness’

Old English lengþ

Middle English lengthe

English length

Today it means

noun The value of n for a Dyck path that begins at the origin (0,0) and ends at the coordinate (2n,0).

Language periods are conventional ranges, not dates for this word.

Etymograph / semilength