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## triangular

```  3  definitions  found

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Triangular  \Tri*an"gu*lar\,  a.  [L.  triangularis:  cf  F.
triangulaire.]
1.  Having  three  angles;  having  the  form  of  a  triangle.

2.  (Bot.)  Oblong  or  elongated,  and  having  three  lateral
angles;  as  a  triangular  seed,  leaf,  or  stem.

{Triangular  compasses},  compasses  with  three  legs  for  taking
off  the  angular  points  of  a  triangle,  or  any  three  points
at  the  same  time.

{Triangular  crab}  (Zo["o]l.),  any  maioid  crab;  --  so  called
because  the  carapace  is  usually  triangular.

{Triangular  numbers}  (Math.),  the  series  of  numbers  formed  by
the  successive  sums  of  the  terms  of  an  arithmetical
progression,  of  which  the  first  term  and  the  common
difference  are  1.  See  {Figurate  numbers},  under
{Figurate}.

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Compasses  \Com"pass*es\,  n.,  pl
An  instrument  for  describing  circles,  measuring  figures,
etc.,  consisting  of  two  or  (rarely)  more  pointed  branches,
or  legs,  usually  joined  at  the  top  by  a  rivet  on  which  they
move

Note:  The  compasses  for  drawing  circles  have  adjustable  pen
points,  pencil  points,  etc.;  those  used  for  measuring
without  adjustable  points  are  generally  called
dividers.  See  {Dividers}.

{Bow  compasses}.  See  {Bow-compass}.

{Caliber  compasses},  {Caliper  compasses}.  See  {Calipers}.

{Proportional},  {Triangular},  etc.,  {compasses}.  See  under
{Proportional},  etc

From  WordNet  r  1.6  [wn]:

triangular
adj  1:  having  three  angles;  forming  or  shaped  like  a  triangle;  "a
triangular  figure";  "a  triangular  pyrimid  has  a
triangle  for  a  base"
2:  involving  three  parties  or  elements;  "the  triangular
mother-father-child  relationship";  "a  trilateral
agreement";  "a  tripartite  treaty";  "a  tripartite
division";  "a  three-way  playoff"  [syn:  {trilateral},  {tripartite},
{three-party},  {three-way}]
3:  having  three  sides;  "a  trilateral  figure"  [syn:  {trilateral},
{three-sided}]
```