obtuse

1. (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.Examples: "For we see a Feather or a Rush drawn along the Lip or Cheek, doth tickle; whereas a thing more obtuse, or a touch more hard, doth not."; "See then the quiver broken and decay'd, / In which are kept our arrows! Rusting there / In wild disorder, and unfit for use, / […] Their points obtuse, and feathers drunk with wine!"; "Yet you do not brighten what would otherwise be dull, impart a keenness to the obtusest point, and diffuse a general lustre?"

2. (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.Examples: "The Herb Pantagruelion hath a little Root somewhat hard and ruff, roundish, terminating in an obtuse and very blunt Point, and having some of its Veins, Strings or Filaments coloured with some spots of white, […]"

3. (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.Examples: "If you put foure Spleets in a Hiue, then cut their backes, where they must leane one against another, to square angles, such as be foure in a circle: if but three, cut them to obtuse angles, such as are three in a circle: (you may readily try them, before you put them in, by Moulds made iust to those formes) and so will they stand close and firme together."; "More-over, as the Buildings Ambligon / May more receive then Mansions Oxigon / (Because th' acute, and the rect-Angles too, / Stride not so wide as obtuse Angles doe) / So doth the Circle in his Circuit span / More room then any other Figure can."; "Obtuse angles of the through crossing. — The system of the two obtuse-angled points is especially termed the dead-crossing. […] The point itself, less liable to damage than that of the crossing proper, on account of its obtuse form and its position relatively to the wheels, acts the same part towards the tapered portion of the cut rail, as the wing-rail does with respect to the acute-angle of the crossing."specifically

4. (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.Examples: "Unless A lies in that part of a semi-infinite strip bounded by AB outside a semi-circle of diameter AB, the triangle is obtuse, so that the probability of getting an obtuse triangle is equal to 1."