Having a form or shape resembling a tree; tree-shaped.
From Latin arbor (tree) + -form (from Latin forma, meaning shape or form). The -form suffix is used across English to describe things shaped like other things (cruciform, etc.).
Lighting creates the most famous arboriform shapes—Lichtenberg figures are branching burn patterns that form when lightning hits sand or wood, creating patterns indistinguishable from actual trees.
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