Formed into a forklike shape; having a fork; dividing into two or more prongs or branches; furcated; bifurcated; zigzag; as, the forked lighting.

resembling a fork; divided or separated into two branches; "the biramous appendages of an arthropod"; "long branched hairs on its legson which pollen collects"; "a forked river"; "a forked tail"; "forked lightning"; "horseradish grown in poor soil may develop prongy roots"

Having a double meaning; ambiguous; equivocal.

having two meanings with intent to deceive; "a sly double meaning"; "spoke with forked tongue"

refers to the posterior margin of the caudal fin – deeply indented

Shaped like a fork; cleft or sharply angled.