wafer
noun
[ ˈweɪfə ]
• a thin, light, crisp biscuit, especially one of a kind eaten with ice cream.
• a thin piece of something.
• "wafers of smoked salmon"
wafer
verb
• fasten or seal (a letter or document) with a wafer.
Origin:
late Middle English: from an Anglo-Norman French variant of Old French gaufre (see goffer), from Middle Low German wāfel ‘waffle’; compare with waffle2.
