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mesosiderite(mess-ŏ-sid -ĕ-rÿt, mee-sobreve;-) See stony-iron meteorite.
a rare type of stony-iron meteorite. Mesosiderites generally contain 45 percent nickel-iron (as inclusions in the stony mass), 30 percent hypersthene, 16.4 percent anorthite, and small quantities of several other minerals.
A stony-iron meteorite containing about equal amounts of silicates and nickel-iron, with considerable troilite. Also known as grahamite.