su·per·flu·id 
(s′pər-flĭd)
(s′pər-flĭd)n.
A fluid, such as liquid helium, that flows with little or no friction at temperatures close to absolute zero.
su′per·flu·idi·ty (-fl-ĭdĭ-tē) n.
- symbiotic
- symbiotical
- symbiotically
- symbol
- symbolic
- symbolical
- symbolically
- symbolicalness
- symbolic language
- symbolic logic
- symbolism
- symbolist
- symbolistic
- symbolistically
- symbolization
- symbolize
- symbolizer
- symbologist
- symbology
- symmetallism
- symmetric
- symmetrical
- symmetrically
- symmetric group
- symmetric key cryptography