Filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood. Synonym:cavernous."The penis is an erectile organ"
... (venous n[oe]vus, angioma cavernosum, n[oe]vus tuberosus) is variously-sized, often considerably elevated, clearly-defined, compressible, smooth or lobulated, and of a dark, purple color; it may, also, be erectile and pulsating. The growth is usually a single formation, and is met with upon all ... — Essentials of Diseases of the Skin • Henry Weightman Stelwagon
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