twiggy (adj.)

• attenuate
• bony
• bowery
• branched
• branching
• branchy
• flat
• foliaged
• foliate
• foliated
• foliose
• gangling
• gangly
• gaunt
• gawky
• lank
• lanky
• leafy
• lean
• leaved
• meager
• ramate
• ramose
• ramous
• rawboned
• reedy
• scraggy
• scrawny
• skeletal
• skinny
• slender
• slight
• slim
• spare
• spidery
• spindly
• tenuous
• undersized
• underweight