| No. | Item | Definition |
|---|---|---|
| 1. | age bracket | a defined range of ages |
| 2. | age group | people born around the same time |
| 3. | ancestors | people from whom one descends |
| 4. | ancestry | family background from earlier relatives |
| 5. | antecedents | earlier versions or predecessors |
| 6. | batch | a group produced at one time |
| 7. | begetting | fathering or producing offspring |
| 8. | birth cohort | people born in the same period |
| 9. | bloodline | family descent through relatives |
| 10. | breeding | producing offspring |
| 11. | byproduct | a secondary produced result |
| 12. | chapter | a distinct period in a story |
| 13. | children | sons and daughters collectively |
| 14. | chronicle | a record arranged by time |
| 15. | chronology | arrangement by time order |
| 16. | cohort | people of the same age group |
| 17. | contemporaries | people living at the same time |
| 18. | course | the progression of events |
| 19. | cycle | a repeating sequence over time |
| 20. | day | a particular time period |
| 21. | derivative | something derived from another |
| 22. | descendants | people descended from an ancestor |
| 23. | descent | family origin through ancestors |
| 24. | development | growth or progress over time |
| 25. | dynasty | family line of rulers or leaders |
| 26. | emergence | coming into view or existence |
| 27. | epoch | a notable period in history |
| 28. | era | a distinct period of time |
| 29. | evolution | gradual development over time |
| 30. | family line | line of related ancestors and descendants |
| 31. | first wave | the earliest group in a series |
| 32. | forebears | ancestors from earlier times |
| 33. | forefathers | male ancestors from earlier times |
| 34. | foremothers | female ancestors from earlier times |
| 35. | foreparents | ancestors; earlier family members |
| 36. | forerunners | earlier people who led the way |
| 37. | founders | those who established a line |
| 38. | genealogy | recorded family descent and relations |
| 39. | growth | increase or development |
| 40. | hand-me-down | something passed to the next |
| 41. | handover | transfer to the next person |
| 42. | harvest | the gathered yield |
| 43. | heirs | those who inherit after someone |
| 44. | heritage | what is passed down |
| 45. | history | the past as a record |
| 46. | house | a noble or ruling family line |
| 47. | inception | the beginning of something |
| 48. | inheritance | what is received from predecessors |
| 49. | interval | a period between events |
| 50. | issue | one’s children or descendants |
| 51. | legacy | something handed down from the past |
| 52. | lineage | family line of descent |
| 53. | making | the act of producing something |
| 54. | manufacture | the making of goods |
| 55. | maturation | becoming fully developed |
| 56. | multiplication | increase by producing more |
| 57. | new wave | a newer group or movement |
| 58. | offspring | children or young produced |
| 59. | originators | those who began something |
| 60. | outcome | the result of a process |
| 61. | output | what is produced |
| 62. | passage | movement from one time to another |
| 63. | peer group | people of similar age |
| 64. | period | a length of time |
| 65. | phase | a stage in a process |
| 66. | posterity | future descendants collectively |
| 67. | precursors | things that came before |
| 68. | predecessors | those who came before |
| 69. | prior wave | earlier group in a sequence |
| 70. | progenitors | original ancestors or founders |
| 71. | progeny | children or descendants |
| 72. | regeneration | renewal; new growth after loss |
| 73. | relay | passing along in sequence |
| 74. | renewal | making something new again |
| 75. | reproduction | producing offspring or copies |
| 76. | result | something produced by a cause |
| 77. | rise | an increase or emergence |
| 78. | round | one cycle in a sequence |
| 79. | run | a series produced in one period |
| 80. | season | a period marked by activity |
| 81. | second wave | the next group in a series |
| 82. | seed | descendants; those who come after |
| 83. | series | a sequence of related sets |
| 84. | shift | a change to a new period |
| 85. | span | a length of time |
| 86. | stage | a step in development |
| 87. | stretch | a continuous period of time |
| 88. | succession | sequence of those who follow |
| 89. | term | a fixed period of time |
| 90. | third wave | a later group in a series |
| 91. | time | a particular era or period |
| 92. | timeline | a sequence of events in time |
| 93. | times | the period in which people live |
| 94. | tradition | customs passed down over time |
| 95. | transition | a change from one period |
| 96. | turn | one’s time in sequence |
| 97. | vintage | A particular time period or cohort. |
| 98. | vintages | Distinct time-based cohorts or batches. |
| 99. | wave | a group arriving in sequence |
| 100. | yield | amount produced |
