An alternative adjectival form describing the condition of having the brain developed outside the skull.
From exencephalia using the adjectival suffix -ous (full of, characterized by). This is a less common variant than 'exencephalic,' showing how medical terminology sometimes develops multiple forms.
Medical terminology is redundant on purpose—'exencephalous' and 'exencephalic' both exist so doctors can choose based on context or journal style. It's controlled redundancy that aids precision.
Complete word intelligence in one call. Free tier — 50 lookups/day.