Definition of "moonwort" [moon•wort]

• See grape fern. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "On the other side of the railway, through Botrychium Bridge named after the moonwort that grew on the bank near by and Second Bog Outflow, was the mysterious Great Bog, where the snipe lay so close they could go off like landmines from under your boot."
• "Culpeper, the herbalist, to illustrate the powers of the plant moonwort, tells of a wonderful incident that occurred to Lord Essex's horse, presumably when his army was here in 1644."
• "The moonwort was formerly associated with many superstitions and was reputed to open all locks at a mere touch, and to unshoe all horses that trod upon it."