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ret·ro·bul·bar -'bəl-bər, -.bär adj situated, occurring, or administered behind the eyeball <a \retrobulbar injection>
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ret·ro·bul·bar (ret″ro-bulґbər) [retro- + bulbar] 1. posterior or inferior to the medulla oblongata. 2. posterior to the eyeball.Medical dictionary. 2011.