Likely, external source dictionaries are attempting to list two independent meanings. TO MOULT as in shed an outer skin, and, SAMARIUM, atomic number element 62 having no known biological functions and not integral to any moulting processes.
Nonetheless, perhaps「molten samarium」as that metal in a liquid state. When ionized in a water solution, the color is BLOOD RED, coincidentally perhaps?「Samarium」is derived from samarskite, the name of the mineral from which it was first isolated, which was itself named after the chief of the Russian Mining Engineering Corps (1845–1861), who served long before the Bolshevik Reds founded in 1903 seized control of Russia during the revolution of 1917.
Literally,「moult samarium」in English means「uncountable moulting and loss of tissue」from either the outer sheath and shaft skin, and-or SPEARING INTO the inner lining of the urethra with a bougie rasp, reaming the pathway to remove scar tissue, both reasons to expose BLOOD RED meat where skin has sloughed, and as liquid excretions during and subsequent to the bougie reaming. CRIPPLING, TO CRIPPLE: scarring from sexually transmitted diseases can cause both a shortened penis and a bent or curled penis, especially when attempting to become erect. This scarring can be removed somewhat by reaming the urethra with a long, thin rasp file, known as a BOUGIE. Gonorrhea and other such diseases cause scar tissue to form within the urethra:
「Peyronie's Disease, …also known as 'Induratio penis plastica,' or more recently 'Chronic Inflammation of the Tunica Albuginea (CITA),' is a connective tissue disorder involving the growth of fibrous plaques in the soft tissue of the penis affecting up to 10% of men. Specifically, scar tissue forms in the tunica albuginea, the thick sheath of tissue surrounding the corpora cavernosa causing pain, abnormal curvature, erectile dysfunction, indentation, loss of girth and shortening. …The disease may cause pain. Hardened, big, cord-like lesions (scar tissue known as 'plaques'). Or abnormal curvature of the penis when erect due to chronic inflammation of the tunica albuginea (CITA). Although the popular conception of Peyronie's Disease is that it always involves curvature of the penis, the scar tissue sometimes causes divots or indentations rather than curvature. The condition may also make sexual intercourse painful and/or difficult…」
[ https://en.wikipedia.org/wiki/Peyronie%27s_disease 2012-08-15 ]

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: spear; to cripple (literary)
Japanese EDRDG: moult samarium
Unihan extended: moult samarium