medullas
medullas is a Latin form of medulla, meaning “marrow; innermost part”. It is the accusative plural feminine noun.
Found 33 times in the Latin texts on Socratos.
Where it is used
Vergil, Aeneid 4.66: quid delubra iuvant? Est mollis flamma medullas
All forms of medulla (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.