1. The cardinal number that is the sum of three and one
   - four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome

Type of: digit, figure

Encyclopedia: Little Joe

• bottlenose whale
• bottler
• bottling plant
• bottom
• bottom dog
• bottom fermentation
• bottom fermenting yeast
• bottom fish
• bottom line
• bottom lurkers
• bottom of the inning
• bottom out
• bottom quark
• bottom rot
• bottom rot fungus
• bottom round
• bottom-dweller
• bottom-dwelling
• bottom-feeder
• bottom-feeding
• bottom-up
• bottomed
• bottomland
• bottomless
• bottomlessness