tomentum

1. Branchlets with sparse woolly tomentum; abaxial veins of leaves with white hairs and with sparse arachnoid tomentum.
   有稀少似羊毛的绒毛层的小枝；叶背面脉具白色的毛和具具稀疏蛛丝状毛。
2. Large tree native to eastern Europe and Asia Minor having leaves with white tomentum on the under side; widely cultivated as an ornamental.
   原产于欧洲东部和小亚细亚的一种高大树，其叶子下面被白色绒毛；广泛作为观赏植物栽培。

noun

1. a network of tiny blood vessels between the cerebral surface of the pia mater and the cerebral cortex

   Synonym:    tomentum cerebri

2. filamentous hairlike growth on a plant
   1. peach fuzz

   Synonym:    hairfuzz