1. Of or related to actinometry
   - actinometric

See also: actinometry

• think over
• think piece
• think tank
• think the world of
• think twice
• think up
• thinkable
• thinker
• thinking
• thinking cap
• thinly
• thinned
• thinner
• thinness
• thinning
• thinning shears
• thio-
• thiobacillus
• thiobacteria
• Thiobacteriaceae
• thiocyanate
• thiocyanic acid
• thiodiphenylamine
• thioguanine
• thiol