| ACHAENIUMS | • ACHAENIUM n. a small one-seeded fruit; a naked seed, also ACHENE, ACHENIUM, AKENE. |
| ACHENIUMS | • acheniums n. Plural of achenium. • ACHENIUM n. a small one-seeded fruit; a naked seed, also ACHAENIUM, ACHENE, AKENE. |
| ASPLENIUMS | • aspleniums n. Plural of asplenium. • ASPLENIUM n. (Greek) a genus of fern, aka spleenwort. |
| HELENIUMS | • heleniums n. Plural of helenium. • HELENIUM n. a type of daisy-like flower. |
| HYMENIUMS | • hymeniums n. Plural of hymenium. • HYMENIUM n. the spore-bearing surface of certain fungi, as that on the gills of a mushroom. |
| INGENIUMS | • INGENIUM n. (obsolete) mentality; talent, genius. |
| PANHELLENIUMS | • PANHELLENIUM n. a council representing all the sections of the Greeks, also PANHELLENION. |
| POSTSCENIUMS | • POSTSCENIUM n. the part of the stage behind the scenery. |
| PROSCENIUMS | • prosceniums n. Plural of proscenium. • PROSCENIUM n. the part of the stage in front of the curtain. |
| RHENIUMS | • rheniums n. Plural of rhenium. • RHENIUM n. a metallic element. |
| ROENTGENIUMS | • ROENTGENIUM n. a short-lived radioactive element produced artificially. |
| RUTHENIUMS | • rutheniums n. Plural of ruthenium. • RUTHENIUM n. a metallic element of the platinum group. |
| SELENIUMS | • seleniums n. Plural of selenium. • SELENIUM n. a nonmetallic solid element used in photoelectric cells. |
| SPLENIUMS | • spleniums n. Plural of splenium. • SPLENIUM n. (Latin) a surgical bandage. |