Structure greater than or equal to 0,5 micro with an aspect ratio of 5 : 1 or greater, and having substantially parallel sides

A panicle having a length to diam

Paniculate at least 5 micr (length to width ratio) of at least 3 : 1. A rodlike st of greater than 3 : Land ers in length with an aspect ratio re having a lenglh of at least three

a solid particle whose length is at least three times its width

any material that has been drawn into a cylinder with a length-to-diameter ratio greater than about ten.

An individual rod of glass of sufficiently small diameter to be flexible, having a known or approximate limit of length.

Any particulate contaminant with a length at least three times greater than its width. [From §210.3(b)(5)

Unit of matter characterized by a high ratio of length to width.