From eutaxy + -ic.
eutactic (not comparable)
- (mathematics, chemistry) Perfectly ordered
- Schläfli, Ludwig (1852) Graf, J. H., editor, Theorie der vielfachen Kontinuität (Republished by Cornell University Library historical math monographs 2010)[1] (in German), Zürich, Basel: Georg & Co., published 1901, →ISBN, page 134