1. (of a microorganism) extremely infective
   "a highly infective organism"

See also: virulent

• tidytips
• tie
• tie beam
• tie clip
• tie down
• tie rack
• tie rod
• tie tack
• tie the knot
• tie-dye
• tie-in
• tie-on
• tie-up
• tieback
• tiebreaker
• tied
• tied up
• tieless
• Tien Shan
• Tien-pao
• Tientsin
• tiepin
• Tiepolo
• tier
• tier up