As a Hindi name
ताम्बूल · tāmbūl · s.m.
The leaf of the Piper betel ( = pān) — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 306
As a Sanskrit word
Meaning
betel, (esp.) its pungent and aromatic leaf (chewed with the areca-nut and catechu and sometimes caustic lime and spices as a carminative and antacid tonic), and; &c.
Verified derivationWhy this matches what you typed
The spelling you confirmed, ताम्बूल, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
tāmbūla m. (= Prākṛt ˚bola fr. tāmragula) = ˚bala, W.
tāmbūla n. betel, (esp.) its pungent and aromatic leaf (chewed with the areca-nut and catechu and sometimes caustic lime and spices as a carminative and antacid tonic), Hariv. 8454 and 8457; Suśr.; VarBṛS. &c.
the areca-nut, L.
tāmbūla nf. (-laṃ-lī) 1 Areca, (Areca faufel or catechu.) 2 Betel, (Piper betel,) or its pungent leaf, which together with the areca nut and catechu, and sometimes caustic lime and spices, is eaten very generally by the natives of the east. n. (-laṃ) The areca nut. m. (-laḥ) Śaṇa, a plant, (Crotolaria juncea.) E. tama to desire, affix ulac, and vukr augment, the radical vowel made long.
Caveats
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