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(Geol.) Pertaining to or designating a period or era recognized by the United States Geological Survey and some other authorities, between the Archæan and the Paleozoic, from both of which it is generally separated in the record by unconformities. Algonkian rocks are both sedimentary and igneous. Although fossils are…

Pertaining to or designating the most extensive of the linguistic families of North American Indians, their territory formerly including practically all of Canada east of the 115th meridian and south of Hudson's Bay and the part of the United States east of the Mississippi and north of Tennessee and Virginia, with the…

Of or pertaining to the algæ, or seaweeds; abounding with, or like, seaweed.

Pertaining to expansions of the ethmoid bone or

Pertaining to aliment or food, or to the function of nutrition; nutritious; alimental; as, alimentary substances. Alimentary canal, the entire channel, extending from the mouth to the anus, by which aliments are conveyed through the body, and the useless parts ejected.

Pertaining to expansions of the nasal bone or cartilage.

Of, pertaining to, or derived from, fat; fatty; -- applied to compounds having an openc-hain structure. The aliphatic compounds thus include not only the fatty acids and other derivatives of the paraffin hydrocarbons, but also unsaturated compounds, as the ethylene and acetylene series.

Pertaining to or forming the wing of the sphenoid; relating to a bone in the base of the skull, which in the adult is often consolidated with the sphenoid; as, alisphenoid bone; alisphenoid canal.

Of or pertaining to alkalimetry.

Of or pertaining to an alkali or to alkalies; having the properties of an alkali. Alkaline earths, certain substances, as lime, baryta, strontia, and magnesia, possessing some of the qualities of alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating al…

Pertaining to, resembling, or containing, alkali.

Pertaining to, or contained in, the allantois. Allantoic acid. (Chem.) See Allantoin.

Of or pertaining to the allantois.

Pertaining to or designating the humid division of the Transition zone extending across the northern United States from New England to eastern Dakota, and including also most of Pennsylvania and the mountainous region as far south as northern Georgia.

Of or pertaining to the Allegheny Mountains, or the region where they are situated. Also Al"le*gha`ny.

Of or pertaining to the time of Allhallows. [Obs.] "Allhallown summer." Shak. (i. e., late summer; "Indian Summer").

Of or pertaining to the genus Allium, or garlic, onions, leeks, etc.; having the smell or taste of garlic or onions.

Pertaining to, or characterized by alliteration.

Pertaining to, or characterized by, alliteration; as, alliterative poetry. -- Al*lit"er*a*tive*ly, adv. -- Al*lit"er*a*tive*ness, n.

Pertaining to allodium; freehold; free of rent or service; held independent of a lord paramount; -- opposed to feudal; as, allodial lands; allodial system. Blackstone.