noun-modifying (irregular)
Medical term describing a condition or process that is spread out, not localized. Used prenominally (e.g., びまん性の～).
びまん性の肺疾患が疑われています。
Diffuse lung disease is suspected.
この患者はびまん性の痛みを訴えている。
This patient complains of diffuse pain.
Antonym meaning 'localized'; used when a condition is confined to a specific area.
From びまん (diffuse, spread) + 性 (nature, -ness). The kanji 瀰漫 means 'spreading widely', but the kana form びまん is standard in modern medical usage.