allowing little light to pass through
adjectivecompact; crowded together
adjectivecrowded together
adjectivedifficult to penetrate
adjectivedifficult to understand
adjectivehaving relatively high density
adjectivein mathematics
adjectivemath: being a well-approximating subset
adjectiveobscure, or difficult to understand
adjectiveopaque; allowing little light to pass through
adjectiveslow to comprehend
adjectiveslow to comprehend; of low intelligence
adjectivethick; difficult to penetrate