noun
attention deficit
Medical term, often used in the context of ADHD (注意欠陥・多動性障害).
注意欠陥はADHDの主要な症状の一つです。
Attention deficit is one of the main symptoms of ADHD.
The full term for ADHD; 注意欠陥 is the attention deficit component.
Compound of 注意 (attention) and 欠陥 (deficit, defect).