microcephalic       
 adjective  medical specialized uk/ˌmaɪ.krəʊ.sɪfˈæl.ɪk/ us/ˌmaɪ.kroʊ.səˈfæl.ɪk/
 小头的,小头畸形的
relating to microcephaly (= the state of having a head that is smaller than normal)
  microcephalic children 小头畸形的小孩 
 The patient's mother is also microcephalic.  这位病人的母亲也患有小头畸形。 
 See: microcephaly
 - More examples
 - When a family with several microcephalic children was referred to him, Walsh became interested in finding out what causes the malady.
 - He was microcephalic and never developed speech.
 - At the age of 4 months, he was noted to be microcephalic.
 
microcephalic       
noun [ C ]  medical specialized uk/ˌmaɪ.krəʊ.sɪfˈæl.ɪk/ us/ˌmaɪ.kroʊ.səˈfæl.ɪk/
 小头畸形患者
a person who suffers from microcephaly (= the state of having a head that is smaller than normal)
  a study of brain shape in human microcephalics 对小头畸形患者大脑形状的研究 
 True hereditary microcephalics live an average-length life span. 真正的遗传性小头畸形患者的平均寿命与常人无异。 
 See: microcephaly
 - More examples
 - Microcephalics do not necessarily have subnormal memories.
 - They measured the skull of a human microcephalic.