grandfather
n.— «During the purification ceremonies, anywhere from four to 20 people would pack into the tarp-covered huts. The lava rocks, or grandfathers as they are called, have already been burning for hours in the wood burner.» —“Ritual drives wedge in community” by Danielle Samaniego in Pleasant Hill Contra Costa Times (California) Aug. 15, 2005. (source: Double-Tongued Dictionary)
Further reading
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...