tomentum noun. [tǝ'mɛntǝm] L17.
[Latin = stuffing for cushions.]
1. Botany. Dense short matted pubescence on the stem, leaves, etc. L17.
2. Anatomy. A downy covering; spec. (more fully tomentum cerebri ['sɛrɪbrʌɪ, -bri:] [= of the brain]) the flocculent inner surface of the pia mater, consisting of numerous minute capillaries. Now rare. E19.

■ tomentulose adjective (Botany) minutely tomentose L19.

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