Dictionary.net

1. That which gives support to a part. 2. Adjuvant.

[Latin] A locomotory spine of certain pupae; posterior fibres of linea alba attached to os pubis.

Lat An adminicle; a prop or support; an accessory thing. An aid or support to something else, whether a right or the evidence of one. It is principally used to designate evidence adduced in aid or support of other evidence, which without it is imperfect Brown.

[L.] Generally used = evidence in support of other evidence.