In the direction that a rostrum would have been located.(adjective)
Serving as a rostrum.(adjective)
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Use "rostral" in a sentence
"They all however had beaks which were a special bone called a rostral at the front of their jaw that no other animal has ever had!"
"Fricke: They have a giant electroreceptor in their head, called the rostral organ."
"Previous studies showed that an area of the brain called the rostral anterior cingulate cortex is activated more when you think about yourself than when you think about another person; this study showed that it is also more active when you think about yourself now as compared with imagining yourself 10 years from now."