1. In a slow, leisurely or prolonged way
   - lingeringly

See also: protracted

• brain drain
• brain edema
• brain fever
• brain fingerprinting
• brain mushroom
• brain science
• brain sugar
• brain surgeon
• brain surgery
• brain trust
• brain truster
• brain tumor
• brain tumour
• brain-fag
• brain-teaser
• brainbox
• braincase
• class Asteroidea
• class Aves
• class Bacillariophyceae
• class Basidiomycetes
• class Bivalvia
• class Bryopsida
• class Cephalopoda
• class Cestoda