| 释义 |
la·cu·na
\ləˈk(y)ünə\ noun
(plural lacu·nae \-k(y)ü(ˌ)nē, -küˌnī\ ; or lacunas \-k(y)ünəz\)
Etymology: Latin, pit, cleft, pool — more at lagoon
1. : a blank space : a missing part : gap, hole; also : defect, flaw
< the lacunae in substantive information — P.M.Hauser >
< with a cultured man there is no gap or lacuna between his opinions and his life — J.C.Powys >
2. [New Latin, from Latin]
a. : one of the follicles in the mucous membrane of the urethra
b. : one of the minute cavities in bone or cartilage occupied by the cells
c.
(1) : one of the small pits on the surface of some of the lichens
(2) : a gap in the protoxylem resulting from breakdown of protoxylem elements during elongation of a root or shoot — called also carinal canal
(3) : a depressed space or pit on the outer surface of a pollen grain
d. : one of the spaces among the tissues of lower animals that serve in place of vessels for the circulation of the body fluids
3. [New Latin, from Latin] capitalized : a large cosmopolitan genus of chinks that is the type of the family Lacunidae but was often formerly included in Littorinidae
Synonyms: see break |