Macrocephaly
A condition, either present at birth or acquired, where the head is abnormally large.
Macrorestriction Map
Map depicting the order of and distance between sites at which restriction enzymes cleave chromosomes.
Malformation
A single localized poor formation of tissue that initiates a chain of subsequent defects in the developing fetus.
Malignant
In reference to neoplasm, having the property of locally invasive and destructive growth and metastasis. Compare to benign.

