Plural of hematoma; collections of blood that leak from blood vessels and pool under the skin or in body tissues, forming bruises.
Plural form of 'hematoma,' from Greek 'haima' (blood) + '-oma' (tumor or mass). While '-oma' usually means tumor, here it just means a collection or pooling of blood.
A black eye is just a hematoma near the eye, and the color changes you see—purple, green, yellow—are hematoidin breaking down, so your bruise is basically showing you the chemistry of healing!
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