Monier-Williams: A Sanskrit-English Dictionary (p. 244)
kaṭutumbī, f. a kind of bitter gourd Suśr.

Tamil Lexicon, University of Madras (p. 1533)
curai: 01 1. Streaming flowing, as of milk; 2. Udder, teat of cow and other animals; 3. Milk cow; 4. Calabash, climber
02 1 toddy; 2. Honey
03 1. Hollowness, hollow interior of a vessel; 2 turbularity. Cavity; 3. Bamboo tube; 4. A kind of oilcan; 5. Female screw; 6. Joint; 7. Head of an arrow; 8. Ferrule; 9. A kind or sharp crow-bar

Tamil Lexicon, University of Madras (p. 825)
kaṟiccurai: Calabash, m. cl., Lagenaria vulgaris

Tamil Lexicon, University of Madras (p. 944)
kiṉṉaraccurai: Calabash climber, as used by snake charmers for a wind-instrument

Dymock, Warden, Hooper: Pharmacographia Indica (vol. II, pp. 67-68)
Lagenaria vulgaris, Cucurbitaceae
The shell of this gourd when dried is much used in the East as a vessel for holding fluids of all kinds, and for making the native guitar or Tambura. The fruit often attains an enormous size, and is used as a buoy for crossing rivers and transporting baggage. Amongst the Hindus as amongst the Greeks gourds are considered to be emblematic of fecundity, prosperity, and good health. There are two varieties of the bottle gourd, a sweet one, called in Sanskrit Alābu, and a bitter one known as Katutumbi. The fruit varies much in shape. The outer rind is hard and ligneous, and encloses a spongy white flesh, very bitter, and powerfully emetic and purgative. The seeds are grey, flat and elliptical, surrounded by a border, which is inflated at the sides but notched at the apex; their kernels are white, oily, and sweet. In India the pulp in combination with other drugs is used in native practice as purgative; it is also applied externally as a poultice. The seeds were originally one of the four cold cucurbitaceous seeds of the ancients, but pumpkin seeds are now usually substituted for them.
The Hindus administer a decoction of the leaves in jaundice; it has a purgative action.
Toxicology. -Dr. Burton Brown notices the poisonous properties of the bitter variety of this gourd, the symptoms observed being similar to those after poisoning by elaterium or colocynth.