hollow
<blank" >target="_blank" >figure class="wp-block-image size-full">A glossary/recessed-bead/" class="glossaryLink" data-cmtooltip="ede38d4a678637ab7e99dc8ab95ce98f" target="_blank" >recessed bead, especially a quarter-hollow/" class="glossaryLink" data-cmtooltip="c0ab0c09f56eb79ad687c80e063a2eea" target="_blank" >quarter hollow, the reverse of the torus. (Bucher, 1996)
