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Definition of Hygroma
1. Noun. a discrete, fluid-filled sac that can form on the joints of dogs or other animals in response to repeated pressure. ¹
¹ Source: wiktionary.com
Medical Definition of Hygroma
1. A cystic swelling containing a serous fluid, such as cystic lymphangioma, housemaid's knee, etc. Synonym: hydroma. Origin: hygro-+ G. -oma, tumour Hygroma axillare, hygroma of the axillary region. (05 Mar 2000)