noun
head line (palm reading)
In palmistry, the line running across the palm associated with intellect and mental tendencies.
手相占いでは、頭脳線が長い人は論理的だと言われる。
In palm reading, people with a long head line are said to be logical.
The heart line, running across the top of the palm, related to emotions.
Compound of 頭脳 (brain, intellect) and 線 (line), directly describing the palm line associated with mental faculties.