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Mac`ro*bi*ot"ics (?), n.
(Physiol.) The art of prolonging life.

Mac`ro*ceph"a*lous (?), a.
[Macro + Gr. kefalh` the head.] 1.
Having a large head.

2. (Bot.) Having the cotyledons of a
dicotyledonous embryo confluent, and forming a large mass compared
with the rest of the body. Henslow.

Mac`ro-chem"is*try (?), n. [Macro-
+ chemistry.] (Chem.) The science which
treats of the chemical properties, actions or relations of substances
in quantity; -- distinguished from micro-chemistry.

||Mac`ro*chi"res (?), n. pl. [NL., fr.
Gr. makro`s long + &?; hand.] (Zoöl.) A
division of birds including the swifts and humming birds. So called
from the length of the distal part of the wing.

Mac"ro*cosm (?), n. [Macro- +
Gr. &?; the world: cf. F. macrocosme.] The great world;
that part of the universe which is exterior to man; -- contrasted
with microcosm, or man.


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