n. (Chem.) An organic base, especially one of a class of nitrogen-containing substances occurring ready formed in the tissues of plants and the bodies of animals. [ 1913 Webster ]

☞ Alkaloids all contain nitrogen, carbon, and hydrogen, and many of them also contain oxygen. They include many of the active principles in plants; thus, morphine and narcotine are alkaloids found in opium. [ 1913 Webster ]

{ } a. [ Alkali + -oid: cf. F. alcaloïde. ] 1. Pertaining to, resembling, or containing, alkali. [ 1913 Webster ]

2. of or pertaining to alkaloids. [ WordNet 1.5 ]

n. (Chem.) A bitter purgative principle in aloes. [ 1913 Webster ]

n. [ Gr. &unr_; almond + -oid: cf. F. amygdaloïde. ] (Min.) A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, esp. agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava. [ 1913 Webster ]

{ } a. 1. Almond-shaped. [ 1913 Webster ]

2. Pertaining to, or having the nature of, the rock amygdaloid. [ 1913 Webster ]

a. [ Astragalus + -oid. ] (Anat.) Resembling the astragalus in form. [ 1913 Webster ]

adj. 1. of or pertaining to a bungalow; similar to a bungalow. [ WordNet 1.5 ]

2. having many bungalows. the bungaloid suburbs [ WordNet 1.5 ]

a. [ Cephalo- + -oid. ] Shaped like the head. Craing. [ 1913 Webster ]

n. An encephaloid cancer. [ 1913 Webster ]

a. [ Gr. 'egke`falos + -oid. ] Resembling the material of the brain; cerebriform. [ 1913 Webster ]

Encephaloid cancer (Med.), a very malignant form of cancer of brainlike consistency. See under Cancer. [ 1913 Webster ]

a. [ Gr. "a`ls, "alo`s salt + -oid: cf. F. haloïde. ] (Chem.) Resembling salt; -- said of certain binary compounds consisting of a metal united to a negative element or radical, and now chiefly applied to the chlorides, bromides, iodides, and sometimes also to the fluorides and cyanides. -- n. A haloid substance. [ 1913 Webster ]

{ } a. [ Gr. "omalo`s even + -oid.] (Geom.) Flat; even; -- a term applied to surfaces and to spaces, whether real or imagined, in which the definitions, axioms, and postulates of Euclid respecting parallel straight lines are assumed to hold true. [1913 Webster]

a. [ Gr. &unr_; glassy, transparent; "y`alos glass + &unr_; appearance: cf. F. hyaloïde.] (Anat.) Resembling glass; vitriform; transparent; hyaline; as, the hyaloid membrane, a very delicate membrane inclosing the vitreous humor of the eye. [1913 Webster]

a. [ Hydrocephalus + -oid. ] (Med.) Resembling hydrocephalus. [ 1913 Webster ]

Hydrocephaloid affection (Med.), the group of symptoms which follow exhausting diarrhea in young children, resembling those of acute hydrocephalus, or tubercular meningitis. [ 1913 Webster ]

n. [ From Natal aloes. ] (Chem.) A bitter crystalline substance constituting the essential principle of Natal aloes. Cf. Aloon. [ 1913 Webster ]

a. [ Neanderthal + -oid. ] (Anthropol.) Like, or pertaining to, the Neanderthal skull, or the type of man it represents. [ Webster 1913 Suppl. ]

a. [ Petal + -oid: cf. F. pétaloïde. ] (Bot.) Petaline. [ 1913 Webster ]

a. (Bot.) Having the whole or part of the perianth petaline. [ 1913 Webster ]

Petaloideous division, that division of endogenous plants in which the perianth is wholly or partly petaline, embracing the Liliaceæ, Orchidaceæ, Amaryllideæ, etc. [ 1913 Webster ]

a. [ Sepal + -oid. ] (Bot.) Like a sepal, or a division of a calyx. [ 1913 Webster ]

a. [ NL. Squalus a genus of sharks (fr. L. squalus a kind of sea fish) + -oid. ] (Zool.) Like or pertaining to a shark or sharks. [ 1913 Webster ]

a. (Anat.) Situated under the hyaliod membrane. [ 1913 Webster ]

a. [ Pref. tri- + petaloid. ] (Bot.) Having the form or appearance of three petals; appearing as if furnished with three petals. [ 1913 Webster ]