There are 2 main definitions of conus in English:

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conus 1

Line breaks: conus
Pronunciation: /ˈkəʊnəs/

noun (plural coni ˈkəʊnʌɪ)

1 (in full conus arteriosus ɑːˌtɪərɪˈəʊsəs) The upper front part of the right ventricle of the heart.
Example sentences
  • Since the aorta and the pulmonary artery develop from a common conus arteriosus, irregular and imperfect development of the septum between them may also produce variations.
  • The heart appears to be the most primitive of all adult vertebrates, with the auricle, ventricle and conus arteriosus arranged in straight line, rather than being doubled over one another.
  • A conus artery arising from the aorta was found in 50% of 651 subjects.
2 (in full conus medullaris ˌmɛdəˈlɑːrɪs) The conical lower extremity of the spinal cord.
Example sentences
  • The spinal cord tapers caudally to become the conus medullaris.
  • An MRI (not shown) showed the conus medullaris to be at L1 - L2, and the sacrum to be dysplastic.
  • A spinal ultrasound from the second day of life (not provided) showed the spinal cord conus to be normally positioned at L1.


Late 19th century: from Latin, literally 'cone'.

Definition of conus in:
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There are 2 main definitions of conus in English:

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CONUS 2 Syllabification: CO·NUS
Pronunciation: /ˈkōnəs/

Entry from US English dictionary


chiefly Military
The 48 contiguous states in the United States (that is, all the states except Alaska and Hawaii).


Acronym, from contiguous United States.

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