P3O1S1I1T1R1O1N1I1U1M3S1
16 points
POSITRONIUMS is validvalid
POSITRONIUM, [n]
POSITRONIUM, a positron and and an electron bound together in a short-lived unit, similar to a hydrogen atom [n]
POSITRONIUM, [n]
POSITRONIUM, a positron and and an electron bound together in a short-lived unit, similar to a hydrogen atom [n]