| 单词 | protoplasm |
| 释义 | protoplasm (once / 3692 pages) n Protoplasm is the gooey stuff that living cells are made of. A cell's protoplasm is colorless and surrounded by a plasma membrane. Sometimes people use protoplasm to mean “formless blob of life.” There are many elements that make up the protoplasm of a cell, including the nucleus, amino acids, lipids, and ions. Scientists generally use the word protoplasm to mean the cytoplasm plus the nucleus. It was coined in the 1840s by a German scientist, from the Greek roots proto, "first," and plasma, "something molded or formed." WORD FAMILYprotoplasm: protoplasms USAGE EXAMPLESFrom there it wasn’t such a leap to guess that protoplasm might, in certain extraordinary moments, coalesce and be projected from the body. Slate(Jul 18, 2016) She probably thinks I'm turning myself into a gob of protoplasm or something. Andrew Clements, Things Not Seen(2002) The human race, one prominent advocate declared in 1909, was poised “to dry up the springs that feed the torrent of defective and degenerate protoplasm.” The New Yorker(Apr 27, 2016) n the substance of a living cell (including cytoplasm and nucleus) Syn|Hypo|Hyper living substance cytol, cytoplasm the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism karyoplasm, nucleoplasmthe protoplasm that constitutes the nucleus of a cell germ plasm, plasmthe protoplasm of the germ cells that contains chromosomes and genes blood platelet, platelet, thrombocytetiny bits of protoplasm found in vertebrate blood; essential for blood clotting plasmodiummultinucleate sheet of cytoplasm characteristic of some stages of such organisms as slime molds cytoplastthe intact cytoplasmic content of a cell cytosolthe aqueous part of the cytoplasm within which various particles and organelles are suspended ectoplasmthe outer granule-free layer of cytoplasm endoplasmthe inner portion of the cytoplasm of a cell ground substance, hyaloplasmthe clear nongranular portion of the cytoplasm of a cell central body, centrosomesmall region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules sarcoplasmthe cytoplasm of a striated muscle fiber syncytiuma mass of cytoplasm containing several nuclei and enclosed in a membrane but no internal cell boundaries (as in muscle fibers) substance the real physical matter of which a person or thing consists |
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