Suppose a line 
meets sidelines 
,
,
and 
in points 
,
,
and 
,
respectively. Let 
be the reflection of 
about the midpoint of segment 
, and construct 
and 
similarly. Then 
, 
, and 
are collinear in a line known as the isotomic transversal
of 
(Kimberling 1998, p. 150).
An isotomic transversal is sometimes referred to as an isotomic conjugate (Ehrmann and van Lamoen 2004).
