dendrite; dendritic crystal
Geological term for a branching, tree-like mineral formation often found on rock surfaces. Also used in materials science for similar crystal structures.
See also: デンドライト
Beautiful dendrites can be seen on the surface of this limestone.
Dendrites are formed when manganese oxides crystallize along cracks in rocks.
Compound of 忍 (しのぶ, 'to conceal' or 'fern') and 石 (いし, 'stone'). The exact derivation is uncertain; the name likely refers to the fern-like patterns resembling concealed plants on stone.