sānu : [f.; nt.] a table land.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

sānu (m. and nt.) [vedic sānu] ridge vv 3210; j iii.172. the commentary on the former passage (vva 136), translates vana wood, that on the latter paŋsupabbata; sānupabbata a forest -- hill j iv.277; vi.415, 540; pabbatasānu -- ˚ j iii.175; girisānu -- ˚ j iii.301; iv.195.

Pali-English Dictionary, TW Rhys Davids, William Stede,

sā́nu m. n. (accord. to Uṇ. i, 3 fr. √san
• collateral form 3. snu) a summit, ridge, surface, top of a mountain, (in later language generally) mountain-ridge, table-land RV. &c. &c. (L. also, a sprout
• a forest
• road
• gale of wind
• sage, learned man
• the sun')

Sanskrit-English Dictionary, by M. Monier William