台Taivo A Taiwan Mandarin dictionary

線條

xiàntiáo

ㄒㄧㄢˋ ㄊㄧㄠˊ

Simplified 线条

1line (in drawing, calligraphy etc)
2the lines or contours of a three-dimensional object (hairstyle, clothing, car etc)

Example

他有明顯的肌肉線條。

tā yǒu míngxiǎn de jīròu xiàntiáo

He's ripped.

Keep 線條 and it comes back until you know it.