From Wiktionary, the free dictionary
From non- + obtuse.
nonobtuse (not comparable)
- Not obtuse.
2015, Jan Brandts, Apo Cihangir, “Enumeration and investigation of acute 0/1-simplices modulo the action of the hyperoctahedral group”, in arXiv[1]:It is nonobtuse if none its dihedral angles is obtuse, and acute if additionally none of them is right.
