reta - run-
- retained biomass reactor
- retained dose
- retaining dam
- retaining type of groundwater inflow
- retaining wall
- retardant
- retarded spark timing
- retarding
- retarding agent
- retarding basin
- retarding drainage
- retarding effect
- retarding pool
- retarding reservoir
- retention
- retention basin
- retention drainage
- retention efficiency
- retention of activity
- retention period
- retention pond
- retention terrace
- retention time
- retiring room
- retrievability
- retrofit
- retrofit technology
- retrofitted low-pollution vehicle
- retrofitting
- retrogressive erosion
- retrogressive evolution
- retrogressive succession
- retroreflective placard
- retroviral gene
- retuning
- return air
- return circuit
- return flow
- return flow irrigation
- return flow pollution
