A name for the White Tree of Valinor, the one of the Two Trees which shone with silver light (S/38). The exact meaning of this name is unclear, but its initial element is from the root √SIL “shine (white or silver)” (SA/sil) or possibly from its extended form ᴹ√SILIP (Ety/SIL).
Conceptual Development: The very first name of this tree was ᴱQ. Valpio “Holy Cherry”, appearing in the Qenya Lexicon from the 1910s (LTA2/Silpion, QL/55). In the earliest Lost Tales, however, it was called ᴱQ. Silpion (LT1/73). At this early stage, the name was translated “Cherry-moon” (LT2/215), using the same element ᴱQ. pio “cherry” as its predecessor Valpio. It is unlikely this meaning persisted into later writings. In The Etymologies from the 1930s, the name ᴹQ. Silpion was glossed “White Tree of Valinor” (Ety/BAL). Although not exact, "White Tree" is the best available later translation of this name.
Silpion, a name of the Elder of the Two Trees of Valinor (Telperion, the White Tree). (Silm, SIL, SÍLIP, BAL, ROS1, LR:385) In the pre-classical Tengwar system presupposed in the Etymologies, the name Silpion is also applied to tengwa #29, which letter Tolkien would later call silmë instead.