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lower (Bot.), a plant that flowers in May; also, its blossom. See Mayflower, in the vocabulary. -- May fly (Zoöl.), any species of Ephemera, and allied genera; -- so called because the mature flies of many species appear in May. See Ephemeral fly, under Ephemeral. -- May game, any May-day sport. -- May lady, the que…

marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the medula oblongata.

See Medullary.

Furnished with a medulla or marrow, or with a medullary sheath; as, a medullated nerve fiber.

peppermint, spearmint, etc. The plants have small flowers, usually arranged in dense axillary clusters.

A bird having a mesomyodous larynx.

Having the intrinsic muscles of the larynx attached to the middle of the semirings.

A tubercle projecting from the anterior articular processes of some vertebræ; a mammillary process.

d the millionth part, respectively. See the words formed with these prefixes in the Vocabulary. For metric tables, see p. 1682.

A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called hair pyrites.

morrow, good morning; -- a form of salutation. -- To morrow. See To-morrow in the Vocabulary.

A soft white substance constituting the medullary sheats of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, albumin, and some fat.

ium cells, and resembling, if not identical with, the substance (myelin) forming the medullary sheaths of nerve fibers.

full head, thickly covered with ovate or lanceolate evergreen leaves. It has solitary axillary white or rosy flowers, followed by black several-seeded berries. The ancients considered it sacred to Venus. The flowers, leaves, and berries are used variously in perfumery and as a condiment, and the beautifully mottled woo…

eron; as, the neurenteric canal, which, in embroys of many vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.

or who settles and adjusts the nomenclature of any art or science; also, a list or vocabulary of technical names.

A vocabulary, dictionary, or glossary. [R.]

Not medullated; (Anat.) without a medulla or marrow, or without a medullary sheath; as, a nonmedullated nerve fiber.

A tutelary deity; a genius.

An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebræ and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.