[1] : The Collaborative International Dictionary of English v.0.48

sagittate \sag"ittate\, a. nl. sagittatus, fr. l. sagitta an
   arrow.
   shaped like an arrowhead; triangular, with the two basal
   angles prolonged downward.
   1913 webster

[2] : WordNet (r) 2.0

sagittate
     adj : of a leaf shape; like an arrow head without flaring base
           lobes syn: sagittiform, arrow-shaped
see also:
sagittiform arrow-shaped 

Sagittate >> S Words
Sagittate, definition of term: Sagittate
sagittate_pag1.html