type of ornament worn by the ancient Romans, especially a protective amulet worn around the neck by children, 1876, from Latin bulla (plural bullae) "round swelling, knob," literally "bubble" (see bull (n.2)).
Entries linking to bulla
bull n.2
"papal edict, highest authoritative document issued by or in the name of a pope," c. 1300, from Medieval Latin bulla "sealed document" (source of Old French bulle, Italian bulla), originally the word for the seal itself, from Latin bulla "round swelling, knob," said ultimately to be from Gaulish, from PIE *beu-, a root supposed to have formed a large group of words meaning "much, great, many," also words associated with swelling, bumps, and blisters (source also of Lithuanian bulė "buttocks," Middle Dutch puyl "bag," also possibly Latin bucca "cheek").