I. -_strəl adjective
Etymology: New Latin rostralis, from Latin rostrum beak, ship's beak + -alis -al
1. : of or relating to a rostrum ; specifically : of, relating to, or being a scale or plate bordering the median part of the upper lip in some reptiles
2. : adorned with rostra
rostral pillar
3.
a. of a part of the spinal cord : superior
b. of a part of the brain : anterior or ventral
• ros·tral·ly -əlē adverb
II. noun
( -s )
: a rostral plate or shield