English
pseudoconcave
From pseudo- + concave.
Today it means
adj (said of a function) differentiable and decreasing in any direction where it has a negative directional derivative.
Sources
Sources: Wiktionary, “pseudoconcave”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / pseudoconcave