| archipallium | (noun) the olfactory cortex of the cerebrum | Synonyms: paleocortex |
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| bdellium | (noun) aromatic gum resin; similar to myrrh | - |
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| berkelium | (noun) a radioactive transuranic element; discovered by bombarding americium with helium | Synonyms: atomic number 97, Bk |
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| beryllium | (noun) a light strong brittle grey toxic bivalent metallic element | Synonyms: atomic number 4, Be, glucinium |
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| cilium | (noun) a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms | - |
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| (noun) any of the short curved hairs that grow from the edges of the eyelids | Synonyms: eyelash, lash |
| dictostylium | (noun) any slime mold of the genus Dictostylium | - |
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| endothelium | (noun) an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities | - |
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| epithelium | (noun) membranous tissue covering internal organs and other internal surfaces of the body | Synonyms: epithelial tissue |
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| folium | (noun) a thin layer or stratum of (especially metamorphic) rock | - |
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| gallium | (noun) a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores | Synonyms: atomic number 31, Ga |
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| helium | (noun) a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) | Synonyms: atomic number 2, He |
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| ilium | (noun) the upper and widest of the three bones making up the hipbone | - |
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| mesothelium | (noun) epithelium originating in the embryonic mesoderm; lines the primordial body cavity | - |
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| milium | (noun) a small whitish lump in the skin due to a clogged sebaceous gland | Synonyms: whitehead |
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| mycelium | (noun) the vegetative part of a fungus consisting of a mass of branching threadlike hyphae | - |
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| neopallium | (noun) the cortical part of the neencephalon | Synonyms: neocortex |
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| neuroepithelium | (noun) epithelium associated with special sense organs and containing sensory nerve endings | - |
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| nobelium | (noun) a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known | Synonyms: atomic number 102, No |
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| pallium | (noun) cloak or mantle worn by men in ancient Rome | - |
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| (noun) (Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back | - |
| (noun) (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell | Synonyms: mantle |
| (noun) the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum | Synonyms: cerebral cortex, cerebral mantle, cortex |
| penetralium | (noun) the innermost parts | - |
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| perithelium | (noun) tissue layer around small blood vessels | - |
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| promycelium | (noun) the basidium of various fungi | - |
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| psyllium | (noun) plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative | Synonyms: fleawort, Plantago psyllium, Spanish psyllium |
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| scholium | (noun) a marginal note written by a scholiast (a commentator on ancient or classical literature) | Synonyms: scholia |
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| supercilium | (noun) the arch of hair above each eye | Synonyms: brow, eyebrow |
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| thallium | (noun) a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores | Synonyms: atomic number 81, Tl |
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| thulium | (noun) a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime | Synonyms: atomic number 69, Tm |
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| trillium | (noun) any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower | Synonyms: wake-robin, wood lily |
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| verticillium | (noun) a fungus of the genus Verticillium | - |
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