| wool ball | A trichophytobezoar formed chiefly of wool and vegetable matter in the stomach of sheep. (05 Mar 2000) |
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| hair ball | A hair cast in the stomach or intestinal tract, common in cats. Synonym: hair ball, pilobezoar. Origin: tricho-+ bezoar (05 Mar 2000) |
| dust ball | A mass sometimes found in the stomach or intestine of an animal fed on mill cleanings. (05 Mar 2000) |
| food ball | A gastric concretion formed of vegetable fibres, with the seeds and skins of fruits, and sometimes starch granules and fat globules. Synonym: food ball. Origin: phyto-+ bezoar (05 Mar 2000) |
| fungus ball | A compact mass of fungal mycelium and cellular debris, 1 to 5 cm in diameter, residing within a lung cavity; such cavities may be produced by bacterial as well as mycotic infectious agents, but they are usually produced by Aspergillus fumigatus or, more rarely, by A. Niger. See: aspergilloma. (05 Mar 2000) |