Resembling or having the appearance or characteristics of blood vessels or a vascular system.
From Greek 'angeion' (vessel) + '-oid' (resembling/like). This suffix '-oid' is extremely common in scientific terminology to indicate something looks like or resembles something else.
Angioid is the suffix doctors use when something looks blood-vessel-like under a microscope—like angioid streaks in the eye, which look like branching vessel scars.
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