Antonyms of adj 3-membered

1 sense of 3-membered

Sense 1
three-membered, 3-membered -- (of a chemical compound having a ring with three members)

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

Similarity of adj 3-membered

1 sense of 3-membered

Sense 1
three-membered, 3-membered -- (of a chemical compound having a ring with three members)
       => membered (vs. memberless) -- (having members; normally used in chemistry in combination with a number)