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[lon-ji-tood-n-l, -tyood-] /ˌlɒn dʒɪˈtud n l, -ˈtyud-/

of or relating to or length:
longitudinal measurement.
extending in the direction of the length of a thing; running lengthwise:
a thin, longitudinal stripe.
Zoology. pertaining to or extending along the long axis of the body, or the direction from front to back, or head to tail.
pertaining to a research design or survey in which the same subjects are observed repeatedly over a period of time.
a member, as in the hull of a ship.
/ˌlɒndʒɪˈtjuːdɪnəl; ˌlɒŋɡ-/
of or relating to longitude or length
placed or extended lengthways Compare transverse (sense 1)
(psychol) (of a study of behaviour) carried on over a protracted period of time

1706, from Latin longitudo (see longitude) + -al (1).

longitudinal lon·gi·tu·di·nal (lŏn’jĭ-tōōd’n-əl, -tyōōd’-)
Running in the direction of the long axis of the body or any of its parts.


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