Meanings
- not comparablebiologySloping.
Fastigium of the vertex declivant or sloping.
1909, Frederick Du Cane Godman, Osbert Salvin, Biologia Centrali-americana: Zoology, Botany and Archaeology, page 2102 more examples
Head but slightly tumid above; front regularly arcuate and slightly declivant, the frontal costa broadening constantly in width toward the labrum, acuminate above; vertex narrow, the eyes being separated by a space less than equal to the diameter of one of the eyes, the fastigum scarcely declivant; […]
1875, Samuel H. Scudder, Entomological Notes, page 86Head but little tumid above; front vertical above, roundly declivant below the costa, nearly equal, but broadening and fading on approaching the labrum, a little constricted above the antennæ; vertex moderately broad, the eyes[…]
1917, University of Kansas. Department of Entomology, Studies in Kansas Insects: A Treatise Descriptive of the More Common Species, page 90
Origin
Ultimately related to Latin dēclīvis.
Full word history & related roots →Cite this entry
declivant. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/declivant
“declivant.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/declivant. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “declivant,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/declivant.
Source: declivant on Wiktionary, CC BY-SA 4.0.