Submitted by Charlotte Wile - July 16, 2002
The encircled ad lib. sign could also be used in indications for “any number of unspecified body parts” (Ex. 2a), “any number of limbs” (Ex. 2b), etc. This fits the established method of indicating a specific number of body parts, such as three unspecified body parts, two limbs, etc. (Ex. 2c and 2d)).