Relating to or derived from equisetum (horsetail plants); having properties characteristic of horsetails.
From 'equisetum' + '-ic' (adjective suffix). This technical term describes things related to horsetail plants or their properties.
Equisetic silica—the mineral coating on horsetails—is so abrasive that settlers used these plants as natural scouring pads to clean pots before we invented steel wool!
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