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From Vulgar Latin *circlus, from Classical Latin circulus


cylch f (plural cylchau or cylchoedd)

  1. circle, ring
    1. compass, scope, range
    2. circumference
    3. environs, surroundings, precincts
    4. (geography) zone
    5. zone, belt
    6. chaplet, diadem
    7. barrel-hoop; rim of wheel
    8. hoop of petticoat
    9. child's hoop
    10. (mathematics) circle; space enclosed within it
    11. (figuratively) social circle; set of people, etc., class
  2. orbit, revolution, circuit tour
    1. period, cycle
    2. halo
    3. journey round about a field (in mowing, ploughing, etc.)
  3. course, order, turn (in order of succession), rota; rotation (especially of crops); round of 'penillion' singing
  4. progress (in the Welsh laws) made by the king himself (originally) or by a lord, together with some members and officers of the court, through the commote, etc., during which free quarters were provided
    1. later this system of free quartering was replaced by food dued which were further commuted into tributes and money payments
    2. judicial circuit
    3. district through which a judge makes his circuit
  5. group, guild, society

Derived terms[edit]

  • cylchu (to hoop, rim; to circle, encircle, encompass, surround, enclose; to roll; to make a progress through, make a tour or circuit of (territory, etc.); to perambulate)


Welsh mutation
radical soft nasal aspirate
cylch gylch nghylch chylch
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.


  • cylch”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies, 2014