Flutes, 72 four inches deep, corrugate the beast's underpart from tail to neck.
However, "broad-browed Verulam," let not that brow's breadth cloud or corrugate in vexation at my persiflage.
Yet we had watched his smooth brow furrow and corrugate as under some carking care or devouring sorrow.
1620s; implied earlier as a past participle adjective (early 15c.), from Latin corrugatus, past participle of corrugare "to wrinkle very much," from com-, intensive prefix (see com-), + rugare "to wrinkle," of unknown origin.
