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Related to Leontiasis Ossea: porphyria, platybasia


n. pl. meg·a·ceph·a·lies

meg′a·ce·phal′ic (-sə-făl′ĭk), meg′a·ceph′a·lous (-sĕf′ə-lĕs) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌmɛɡəˈsɛfəlɪ) or


(Pathology) the condition of having an unusually large head or cranial capacity. It can be of congenital origin or result from an abnormal overgrowth of the facial bones. Compare microcephaly
megacephalic, ˌmegaˈcephalous, ˌmegaloceˈphalic, ˌmegaloˈcephalous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megacephaly - an abnormally large headmegacephaly - an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical
abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
It leads to bones that are weak and prone to expansion, which in turn can cause leontiasis ossea (lion face syndrome).
Renal osteodystrophy in the setting of hyperparathyroidism, leontiasis ossea pattern.
Fibrous dysplasia involving the face and skull is called "Leontiasis ossea." Without treatment, one or more bones progressively increase in size and move into the cavities of the eye, mouth and/or the nose and its sinuses.