What is "treetrunks"

Usage examples of "treetrunks".

Gardens laced with white-ice hoarfrost, fairy-silver grass, and black treetrunks beneath hammered-metal branches, flowerbeds pruned back and dormant beneath their coats of mulch-straw.

Those were reaved through block-and-tackle at the outer lip of the position, in turn fastened to treetrunks driven deep into the soil.