neogrammarian

Century Dictionary and Cyclopedia

1. n. An adherent of a school of students of comparative Indo-European grammar (since about 1875), who insist especially upon the importance and strictness of the laws of phonetic change.

Wiktionary

1. n. Alternative form of Neogrammarian.

GNU Webster's 1913

1. n. One of a group of philologists who apply phonetic laws more widely and strictly than was formerly done, and who maintain that these laws admit of no real exceptions.