butterfly / someone brilliant, versatile and inconstant / knot / Ellipsis of écrou papillon.; wing nut, butterfly nut / butterfly stroke / parking ticket / butterfly valve

plural of nœud papillon

bowtie

plural of effet papillon

butterfly effect

plural of porte papillon

butterfly door (a door mounted on a central pivot point which opens both inwards and outwards at the same time from the two halves) / a door which opens upwards, such as gullwing doors and scissor doors

(informal) hold your horses! not so fast! hang on!

moth

plural of papillon