Antonyms of adj four-membered

1 sense of four-membered

Sense 1
four-membered, 4-membered -- (of a chemical compound having a ring with four members)

INDIRECT (VIA membered) -> memberless -- (of a group or set having no members)

Similarity of adj four-membered

1 sense of four-membered

Sense 1
four-membered, 4-membered -- (of a chemical compound having a ring with four members)
       => membered (vs. memberless) -- (having members; normally used in chemistry in combination with a number)