cervix

n. neck; neck-like part of the uterus

The cervix (from Latin "neck") is the lower, narrow portion of the uterus where it joins with the top end of the vagina. It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall. Approximately half its length is visible with appropriate medical equipment; the remainder lies above the vagina beyond view. It is occasionally called "cervix uteri", or "neck of the uterus".
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Cervix /cer·vix/ pl. cer´vices [L.] 1. neck. 2. the front portion of the neck. 3. cervix uteri. incompetent cervix a uterine cervix abnormally [more]Cervix - Community and Resources

Noun
1. the part of an organism that connects the head to the rest of the body; "he admired her long graceful neck"
(synonym) neck
(hypernym) external body part
(hyponym) bull neck
(part-holonym) body, organic structure, physical structure
(part-meronym) dewlap
2. necklike opening to the uterus
(synonym) uterine cervix, cervix uteri
(hypernym) orifice, opening, porta
(hyponym) incompetent cervix
(part-holonym) uterus, womb

n. cervix, wildlife passage, wildlife crossing, habitat, allowing animals to cross roads safely; lower narrow portion of the uterus