noun.
A proofreading symbol (⁁) used to indicate where something is to be inserted in a line of printed or written matter.
The Century Dictionary and Cyclopedia
noun.
A mark (∧) used in writing, in correcting printers' proofs, etc., to indicate the proper place of something that is interlined or written in the margin.
noun.
A name of the hawkbill sea-turtle, Eretmochelys imbricata.
the GNU version of the Collaborative International Dictionary of English
noun.
A mark [^] used by writers and proof readers to indicate that something is interlined above, or inserted in the margin, which belongs in the place marked by the caret.