1. In an imperceptible manner or to an imperceptible degree
   "the power of the Secretary of State in London increased gradually but imperceptibly"
   - unnoticeably

See also: imperceptible

Antonym: perceptibly

• Zea mays indurata
• Zea mays rugosa
• Zea saccharata
• zeal
• Zealand
• Zealander
• zealot
• zealotry
• zealous
• zealously
• zealousness
• zeaxanthin
• zebibit
• zebibyte
• zebra
• zebra crossing
• zebra finch
• zebra mussel
• zebra orchid
• zebra-tailed lizard
• zebrawood
• zebrawood family
• zebrawood tree
• zebroid
• zebu