<p><strong>Noun:</strong></p><ul><li>Zoology: A part or organ resembling a barb of a feather, a fin, or the like.</li><li>A finlet.</li><li>Botany: A secondary pinna, one of the pinnately disposed divisions of a bipinnate leaf.</li><li>A metal plate with a small hole in it, used as a sight in a quadrant.</li></ul>