Section M, N, and O

Prev | Current Page 552 | Next

"Section M, N, and O"

), the rays of cellular tissue seen in a transverse
section of exogenous wood, which pass from the pith to the bark.
-- Medullary sheath (Anat.), the layer
of white semifluid substance (myelin), between the primitive sheath
and axis cylinder of a medullated nerve fiber.

Me*dul"la*ted (?), a. (Anat.)
Furnished with a medulla or marrow, or with a medullary sheath;
as, a medullated nerve fiber.

Me*dul"lin (?), n. [Cf. F.
médulline.] (Bot. Chem.) A variety of
lignin or cellulose found in the medulla, or pith, of certain plants.
Cf. Lignin, and Cellulose.

||Me*du"sa (?), n. [L., fr. Gr. &?;.]
1. (Class. Myth.) The Gorgon; or one of
the Gorgons whose hair was changed into serpents, after which all who
looked upon her were turned into stone.

2. [pl. Medusae (&?;).]
(Zoöl.) Any free swimming acaleph; a
jellyfish.

&fist; The larger medusæ belong to the Discophora,
and are sometimes called covered-eyed medusæ; others,
known as naked-eyed medusæ, belong to the Hydroidea, and
are usually developed by budding from hydroids.

Pages:
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564

Pages from a Journal with Other Papers (page 226) Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 4 (page 488) To The River -- (page 1)

Good Books

"Section M, N, and O"