1. Away from an axis, as in a flower cluster in which the oldest flowers are in the centre, the youngest near the edge

See also: centrifugal

• um
• Uma
• Uma notata
• umami
• Umar al-Mukhtar Forces
• Umayyad
• white wine
• white wolf
• white woman
• white wood aster
• white yam
• white zinnia
• white-alder family
• white-bellied swallow
• white-berry yew
• white-blotched
• white-breasted nuthatch
• white-chinned petrel
• white-coat hypertension
• white-collar
• white-crowned sparrow
• white-edged
• white-faced hornet
• white-flowered
• white-footed mouse