cheder or heder /hhedˈer or hāˈdər/ (Judaism)

1. Religious instruction given outside normal school hours
2. An elementary religious school

• radio-actinium
• radioactive
• radioactively
• radioactive waste
• radioactivities
• radioactivity
• radio alarm
• radio altimeter
• radio amateur
• radio amateurs
• radio assay
• radio assays
• radio astronomies
• radio astronomy
• radioautograph
• radioautographs
• radio beacon
• radio beacons
• radiobiologies
• radiobiologist
• radiobiologists
• radiobiology
• radiocarbon
• radiocarbon dating
• radiocarbons