class Psilopsida
— Navneord
– Engelsk
~ whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
class Psilotatae
— Navneord
– Engelsk
~ whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
Chlamydia psittaci
— Navneord
– Engelsk
~ bacteria responsible for the sexually transmitted disease chlamydia
C. psittaci
— Navneord
– Engelsk
~ bacteria responsible for the sexually transmitted disease chlamydia