-
either codirectional or opposite. Two
directions are
obtuse or
acute if they form, respectively, an
obtuse angle (greater than a
right angle) or
acute angle...
-
smaller than a
straight angle (between 90° and 180°) is
called an
obtuse angle ("
obtuse"
meaning "blunt"). An
angle equal to 1/2 turn (180° or π radians)...
- dextral, and subconic, with
slightly convex outlines. It is
faintly and
obtusely angular at the
periphery and has a
somewhat flattened base. The s**** is rather...
-
description in Latin) The
imperforate s**** is
depressively globose,
obtusely angular and
somewhat translucent. It is yellowish-brown and shiny. It is very...
- fan shaped.
These panicles are
erect or
drooping slightly,
rachides obtusely angular;
glabrous or incon****uously scaberulous,
pedicels 2–5 mm in length...
-
above and
below densely,
finely spirally striate. The
periphery is
obtusely angular. The base is
nearly flat. The
oblique aperture is
smooth within. The...
-
develop an
obtusely angular ventral area and
venter that
disappears toward the
front of the
mature body chamber. The
suture has an
angular ventral saddle...
- well-like
umbilicus with a
cylindrical shape. The
periphery presents an
obtuse angularity. Its surface,
lacking luster,
adopts a
chestnut brown hue. The s****...
- are
nearly smooth. The body
whorl is
slightly deflexed in
front and
obtusely angular at the periphery, with a very
convex base. The deep and
ample umbilicus...
- co****ly lirate. The
sutures are subcanaliculate. The body
whorl is
obtusely angular at the periphery. Its
upper surface is
encircled by 4 co****, somewhat...
