Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. murrĕus (murrhĕus, myr-rhĕus), a, um, adj. [3. murra], of or belonging to the stone murra, murrean: pocula, made of murra, Prop. 4 (5), 5, 26: poculum, Sen. Ep. 119, 3.‡ † murrhacŏpum, i, n., = μύρραἄκοπον, a medicament compounded with myrrh, for removing weariness: acopum murrhacopum, Not. Tir. p. 160.