[1830–40; bi-1 + foliate]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: isomerism, orientation, showcase, stroboscope, walkoverbi- is a combining form meaning “twice,” “two,” used in the formation of compound words.Other words that use the affix bi- include: bilabial, bilateral, bilingual, bimodal, bipolar