Synonym for hygroma ... 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) ... Found on http://www.encyclo.co.uk/local/20973