What does anencephalic mean?
Anencephalic is a medical adjective describing a fetus or infant affected by anencephaly, a severe congenital condition in which a major portion of the brain, skull, and scalp fails to develop. The word combines the Greek-derived negative prefix 'an-' ('without') with 'encephalon' ('the brain'), so it literally signifies 'without a brain.' It is used almost entirely within clinical and scientific contexts — obstetric ultrasound reports, pathology descriptions, embryology texts, and bioethical discussions — where precision matters. Infants with anencephaly are typically stillborn or survive only briefly after birth, which gives the term a somber connotation even in professional settings. Related terms include the noun anencephaly, which names the condition itself, and the broader family of cephalic terms such as cephalic, microcephalic, and hydrocephalic, all rooted in the same Greek vocabulary of the head and brain. For general readers, encountering 'anencephalic' usually signals a discussion of prenatal diagnosis or congenital malformation rather than ordinary language.
adjectiveRelating to or affected with anencephaly — the congenital absence of a major portion of the brain, skull, and scalp. Used chiefly in medical and embryological contexts to describe a fetus or infant born with this fatal condition.
- Describing a fetus or infant born without a major portion of the brain, skull, and scalp (affected by anencephaly).
- More generally, relating to or characteristic of the condition of anencephaly.
"The ultrasound revealed that the fetus was anencephalic."
"Prenatal screening can detect an anencephalic pregnancy early enough for parents to receive counselling."
"The pathology report described the specimen as anencephalic, with the cranial vault largely absent."
The word literally means 'without a brain' — built from Greek roots for 'not' and 'in the head' — and it names one of the most serious neural tube defects doctors screen for in every pregnancy.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of anencephalic
Anencephalic derives from New Latin and ultimately Greek roots: the prefix 'an-' meaning 'without,' combined with 'encephalon,' the Greek term for the brain (literally 'within the head,' from 'en' + 'kephalē'). The compound entered medical Latin as 'anencephalus' for the condition and its adjectival form, and was adopted into English medical terminology during the development of modern anatomy and obstetrics. It shares its root with cognate medical terms such as encephalitis, encephalogram, and hydrocephalus, all built on the same Greek brain-and-head vocabulary.
Related word forms
How anencephalic is actually used
Strictly a medical and scientific term; it appears almost exclusively in clinical, obstetric, and bioethical writing rather than everyday conversation. Because it describes a fatal congenital condition, it carries heavy emotional weight in contexts such as prenatal diagnosis and organ-donation discussions, and should be used with sensitivity outside technical settings.
Easily confused with anencephalic
Encephalic means relating to or having an encephalon (brain), whereas anencephalic means lacking most of the brain — the 'an-' prefix denotes absence.
Anencephaly is the noun naming the congenital condition itself, while anencephalic is the adjective describing something affected by it.