法国式屋顶
复折式屋顶

[ noun ]
a mansard roof with sides that are nearly perpendicular
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French \French\ (fr[e^]nch), prop. a. [AS. frencisc, LL.
franciscus, from L. Francus a Frank: cf. OF. franceis,
franchois, fran[,c]ois, F. fran[,c]ais. See {Frank}, a., and
cf. {Frankish}.]
Of or pertaining to France or its inhabitants.

{French bean} (Bot.), the common kidney bean ({Phaseolus
vulgaris}).

{French berry} (Bot.), the berry of a species of buckthorn
({Rhamnus catharticus}), which affords a saffron, green or
purple pigment.

{French casement} (Arch.) See {French window}, under
{Window}.

{French chalk} (Min.), a variety of granular talc; -- used
for drawing lines on cloth, etc. See under {Chalk}.

{French cowslip} (Bot.) The {Primula Auricula}. See
{Bear's-ear}.

{French fake} (Naut.), a mode of coiling a rope by running it
backward and forward in parallel bends, so that it may run
freely.

{French honeysuckle} (Bot.) a plant of the genus {Hedysarum}
({H. coronarium}); -- called also {garland honeysuckle}.


{French horn}, a metallic wind instrument, consisting of a
long tube twisted into circular folds and gradually
expanding from the mouthpiece to the end at which the
sound issues; -- called in France {cor de chasse}.

{French leave}, an informal, hasty, or secret departure;
esp., the leaving a place without paying one's debts.

{French pie} [French (here used in sense of ``foreign'') +
pie a magpie (in allusion to its black and white color)]
(Zo["o]l.), the European great spotted woodpecker
({Dryobstes major}); -- called also {wood pie}.

{French polish}.
(a) A preparation for the surface of woodwork, consisting of
gums dissolved in alcohol, either shellac alone, or
shellac with other gums added.
(b) The glossy surface produced by the application of the
above.

{French purple}, a dyestuff obtained from lichens and used
for coloring woolen and silken fabrics, without the aid of
mordants. --Ure.

{French red} rouge.

{French rice}, amelcorn.

{French roof} (Arch.), a modified form of mansard roof having
a nearly flat deck for the upper slope.

{French tub}, a dyer's mixture of protochloride of tin and
logwood; -- called also {plum tub}. --Ure.

{French window}. See under {Window}.


Roof \Roof\, n. [OE. rof, AS. hr?f top, roof; akin to D. roef
cabin, Icel. hr?f a shed under which ships are built or kept;
cf. OS. hr?st roof, Goth. hr?t. Cf. {Roost}.]
1. (Arch.) The cover of any building, including the roofing
(see {Roofing}) and all the materials and construction
necessary to carry and maintain the same upon the walls or
other uprights. In the case of a building with vaulted
ceilings protected by an outer roof, some writers call the
vault the roof, and the outer protection the roof mask. It
is better, however, to consider the vault as the ceiling
only, in cases where it has farther covering.

2. That which resembles, or corresponds to, the covering or
the ceiling of a house; as, the roof of a cavern; the roof
of the mouth.

The flowery roof
Showered roses, which the morn repaired. --Milton.

3. (Mining.) The surface or bed of rock immediately overlying
a bed of coal or a flat vein.

{Bell roof}, {French roof}, etc. (Arch.) See under {Bell},
{French}, etc.

{Flat roof}. (Arch.)
(a) A roof actually horizontal and level, as in some
Oriental buildings.
(b) A roof nearly horizontal, constructed of such material
as allows the water to run off freely from a very
slight inclination.

{Roof plate}. (Arch.) See {Plate}, n., 10.