The word "splenin" is spelled with the letter combination "spl," despite the fact that it is pronounced with a single consonant sound. In IPA phonetic transcription, the word is represented as /spliːnɪn/, with the "s" sound in "spl" being silent. This pronunciation can be confusing for those unfamiliar with the word, as it does not follow the typical English pronunciation rules. However, once understood, the spelling is easy to remember and recognize. Splenin is a hormone secreted by the spleen, regulating red blood cells.
Trade name of an extract of the spleen of the ox.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.