| 词汇 | sac |
| 释义 | sac noun[ C ] uk /sæk/ us /sæk/ sacnoun[C] (BAG OF LIQUID)biology specialized a part of a plant or animal that is like a bag and often contains liquid, or a similar artificially made structure: （动植物的）囊，液囊 Bursa are fluid-filled sacs throughout the body whose function is to reduce friction between muscles and tendons as they move over bones. A sac of saline solution is then inserted into the cavity. Parts of plants axil bark bilobed blade caning cascara sagrada corolla endodermis floret inflorescence knot pistil rooty rosella seed coat seed pod sessile sting taproot vein sacnoun[C] (SWOLLEN AREA)medical specialized a type of abscess (= swollen area containing a thick yellow liquid) under the skin: 脓肿 Sacs of pus, called abscesses, may form in the pelvis. Skin complaints & blemishes acne rosacea age spot anti-crack anti-dandruff anti-leprosy cyst dermatitis hickey macular nettlerash papular papule pemphigus pimply prickle pustule scabby ulcer verruca wart sacnoun[C] (TUMOUR)medical specialized a covering that surrounds a tumour（肿瘤的）囊膜 Coverings and layers a blanket of somethingidiom beeswax wrap blanket brazen casing diaphragm interstratify lagging lamella lamellar lamellate rind seam sheath shellac space blanket strata stratum substratum varnish You can also find related words, phrases, and synonyms in the topics: Cancer Swellings & lumps sacnoun[C] (SACRIFICE)informal in baseball, a sacrifice(= an occasion when a player intentionally hits the ball in a way that ends his turn, in order to allow another player to run to the next base): a sac bunt Baseball & rounders 1-2-3 inning ahead alley around the hornidiom at bat bomb curve heater hit the ball out of the parkidiom hitting coach home plate home stand horsehide solo spitter split-fingered fastball splitter squeeze play stretch swing sac | American Dictionarysac noun[ C ] us/sæk/ biology a part inside a plant or animal which is like a small bag and contains liquid or air Examples of sacsac The everted sac experiments are prone to methodological errors, especially damage caused by the everting procedure, but we took great care to minimize these. No trematodes were observed in the lung or air sac, heart, liver, spleen and kidney of all bats and swallows. To bypass some of the potentially complex requirements for fertilisation, we used isolated embryo sacs rather than isolated egg cells. The visceral yolk sac, allantois and amnion were dissected away from the fetal material and excess fluid was wiped clear prior to measuring the weight. The exocoelomic cavity contains the yolk sac, which is connected to the primitive digestive tract and fetal circulation. Tested organs include lung or air sac, heart, spleen, liver, kidneys and intestine. Various-sized blebs developed in the area between the oral sucker and ventrogenital sac. This in turn was shown to depend on the growth rates of the embryo and embryo sac, both of which differed between genotypes. We estimate that two experimenters can microinject a maximum of 15 embryo sacs per experiment with a 14% success rate of injecting recipient cells. The trend was in the order yolk sac endoderm epiblast derivatives > placenta. The eye movement classification is indicated in the upper left corner of the histogram (saccade sac, mixed mix, position 0drift activated pos). These two tubes expand partially into five pairs of sac-like structures. Part of the filler wire protruded from the final sac. Visualisation of the complete cervical canal with a gestational sac over it and an empty uterine cavity confirms placental insertion in the scar. The paired ovaries of these caecilians are elongated sac-like structures each including numerous vitellogenic follicles. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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