austeniidi lagunemisel beiniidiala ülaosas moodustunud väga peen ferriidi-tsementiidisegu (vt beiniit, beniitmuutus; vrd alabeiniit), microconstituent occuring as a result of bainitic transformation of undercooled austenite in upper part of bainitic range (see: bainite, bainitic transformation; compare: lower bainite)
