dys·cal·cu·li·a 
(dĭs′kăl-kylē-ə)
(dĭs′kăl-kylē-ə)n.
Impairment of the ability to understand and solve mathematical problems.
[DYS– + CALCUL(ATE) + –IA1.]
- attenuator
- attest
- attestant
- attestation
- attester
- attestor
- Att. Gen.
- at that
- at the dot
- at the double
- at the drop of a hat
- at the drop of a hat
- at the end of one's rope
- at the end of (one's) rope/tether
- at the end of one's tether
- at the end of rope
- at the end of tether
- at the end of the day
- at thehand
- at thehand/handsof
- at the latest
- at the mercy of
- at (the) most
- at the most
- at the ready