a. [ L. alga + -oid. ] Of the nature of, or resembling, an alga. [ 1913 Webster ]

n. [ Ar. al-ghūl destruction, calamity, fr. ghāla to take suddenly, destroy. ] (Astron.) A fixed star, in Medusa's head, in the constellation Perseus, remarkable for its periodic variation in brightness. [ 1913 Webster ]

a. Of or pertaining to algology; as, algological specimens. [ 1913 Webster ]

n. One learned about algæ; a student of algology. [ 1913 Webster ]

n. [ L. alga seaweed + -logy. ] (Bot.) The study or science of algæ or seaweeds. [ 1913 Webster ]

n. [ Gr. &unr_; pain + -meter. ] (Psychol.) An instrument for measuring sensations of pain due to pressure. It has a piston rod with a blunted tip which is pressed against the skin. -- Al*gom"e*try n. -- Al`go*met"ric *met"ric*al a. -- Al`go*met"ric*al*ly, adv. [ Webster 1913 Suppl. ]

a. 1. Var. of Algonquian. [ Webster 1913 Suppl. ]

2. (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 rare, life certainly existed in this period. -- n. The Algonkian period or era, or system or group of systems. [ Webster 1913 Suppl. ]

{ } prop. n. One of a widely spread family of Indians, including many distinct tribes, which formerly occupied most of the northern and eastern part of North America. The name was originally applied to a group of Indian tribes north of the River St. Lawrence. [ 1913 Webster ]

a. 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 exception of the territory occupied by the northern Iroquoian tribes. There are nearly 100, 000 Indians of the Algonquian tribes, of which the strongest are the Ojibwas (Chippewas), Ottawas, Crees, Algonquins, Micmacs, and Blackfeet. -- n. An Algonquian Indian. [ Webster 1913 Suppl. ]

‖n. [ L. ] (Med.) Cold; chilliness. AS [ 1913 Webster ]

Algor mortis (Med.), The decrease of body temperature to room temperature after death. [ AS ]