cellular striation

cellular striation

[′sel·yə·lər strī′ā·shən]
(engineering)
Stratum of cells inside a cellular-plastic object that differs noticeably from the cell structure of the remainder of the material.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

cellular striation

In a cellular material, such as plastic, a layer of cells that differ greatly from the characteristic cell structure of the material.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.