(rare) One who uses or consumes opiates including heroin.

(medicine) A dark green mass, the contents of the fetal intestines during the later stages of mammalian gestation, that forms the first feces of the newborn. / (obsolete) Opium.

(zoology) A kind of gonophore produced by hydroids of the genus Gonothyraea (Campanulariidae), having tentacles, and otherwise resembling a free medusa, but remaining attached by a pedicel.

plural of meconidium

(organic chemistry) A dicarboxylic acid related to pyrone found in certain poppies.

(organic chemistry) An acid which occurs in opium and may be obtained by oxidizing narcotine.

(chemistry) A substance regarded as an anhydride of meconinic acid, found in opium.

methylcobalamin

plural of mecochirid

plural of meconophagist