bilinear /bī-linˈi-ər/

1. Of or involving two lines
2. (of a mathematical expression) containing two variables, each of which is linear

• heartsink
• heartsinks
• heartsome
• heart-sore
• heart-spoon
• heart-spoons
• heart-stirring
• heart-stricken
• heart-strike
• heart-strikes
• heart-striking
• heart-string
• heart-strings
• heart-strook
• heart-struck
• heart-throb
• heart-throbs
• heart-to-heart
• heart-to-hearts
• heart urchin
• heart urchins
• heartwarming
• heartwater
• heartwaters
• heart-whole