tanbark
noun/tænˈbɑɹk/ · California /tæmˈbɑɹk/
Etymology From tan + bark.
1
The bark of the oak (or other trees) used as a source of tannin.
2
The spent bark used as a ground covering.
- Another circle of groats, crowning a temporary pathway of tanbark flung wide around the first two rings, provided dry footing for the rest of the guests.2004, Lois McMaster Bujold, Winterfair Gifts:
3
Woodchips, especially when used as a ground covering on children's playgrounds.
In the San Francisco Bay Area