Definition of rostral in English:



  • 1Anatomy
    Situated or occurring near the front end of the body, especially in the region of the nose and mouth or (in an embryo) near the hypophyseal region:

    ‘the rostral portion of the brain’
    • ‘Some muscles are more effective in the rostral airway, whereas others exert their greatest effect in more caudal regions.’
    • ‘The surgeon makes a pair of additional lesions 10 mm to 15 mm rostral and caudal to the first at each ganglion site to destroy the entire fusiform ganglion.’
    • ‘There may also be stimuli that originate from a region of the brain rostral to the pons and medulla (possibly the hypothalamus and motor cortex) and operate independently of the other stimuli.’
    • ‘The typical somatic nerve fibers in the striated muscle at the rostral end of the organ terminate in motor end plates.’
    • ‘A peristaltic contraction, a single front of contraction moving smoothly from the rostral end of the esophagus to the stomach, always follows a swallow.’
  • 2Zoology
    Of or on the rostrum:

    ‘in these snakes the rostral shield is enlarged and flattened’


Early 19th century: from rostrum + -al.