1. (especially of human beings) at the age immediately before puberty; often marked by accelerated growth
   - prepubescent

See also: immature, prepuberty

• umbelliferous
• umbelliferous plant
• umbelliform
• Umbellularia
• Umbellularia californica
• umber
• umbilical
• umbilical cord
• umbilical hernia
• umbilical vein
• umbilical vesicle
• umbilicate
• umbilicus
• umbles
• umbo
• umbra
• umbrage
• umbrageous
• umbrella
• umbrella arum
• umbrella bird
• umbrella fern
• umbrella magnolia
• umbrella pine
• umbrella plant