e·ra 
(îrə, ĕrə)
(îrə, ĕrə)n.
1. A period of time as reckoned from a specific date serving as the basis of its chronological system.
2. A period of time characterized by particular circumstances, events, or personages: the Colonial era of US history; the Reagan era.
3. The longest division of geologic time, made up of one or more periods.
[Late Latin aera, from Latin, counters, pl. of aes, aer-, bronze coin; see ayes- in the Appendix of Indo-European roots.]
- Indo-European root: paəwr̥
- Indo-European root: ped-
- Indo-European root: peig-
- Indo-European root: peiə-
- Indo-European root: peku-
- Indo-European root: pekw-
- Indo-European root: pel-
- Indo-European root: pel-
- Indo-European root: pel-
- Indo-European root: pel-
- Indo-European root: pel-
- Indo-European root: pelə-
- Indo-European root: pelə-
- Indo-European root: pelə-
- Indo-European root: penkwe
- Indo-European root: pent-
- Indo-European root: per
- Indo-European root: per-
- Indo-European root: per-
- Indo-European root: per-
- Indo-European root: per-
- Indo-European root: perd-
- Indo-European root: perkwu-
- Indo-European root: perə-
- Indo-European root: perə-