102,863
edits
Changes
From Nordan Symposia
Jump to navigationJump to searchCreated page with 'File:lighterstill.jpgright|frame An '''embryo''' (irregularly from Greek: ἔμβρυον, plural ἔμβρυα, lit. "that which grows," from en- ...'
[[File:lighterstill.jpg]][[File:Embryo_2.jpg|right|frame]]
An '''embryo''' (irregularly from [[Greek]]: ἔμβρυον, plural ἔμβρυα, lit. "that which grows," from en- "in" + bryein "to swell, be full"; the proper [[Latin]]ate form would be embryum) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In [[human]]s, it is called an embryo until about eight weeks after fertilization (i.e. ten weeks LMP), and from then it is instead called a [[fetus]].
The development of the embryo is called embryogenesis. In [[organisms]] that reproduce [[sexual]]ly, once a sperm fertilizes an egg cell, the result is a cell called the zygote that has half of the DNA of each of two parents. The resulting embryo derives 50 percent of its genetic makeup from each parent. In plants, animals, and some protists, the zygote will begin to divide by mitosis to produce a multicellular organism. The result of this [[process]] is an embryo.
==Definition==
===Noun===
*1. The offspring of an [[animal]] before its birth (or its emergence from the egg): a. of man. In mod. technical [[language]] restricted to ‘the ftus in utero before the fourth month of pregnancy’ (Syd. Soc. Lex.) (now, before the third month).
::b. of animals.
*2. Bot. ‘The rudimentary plant contained in the seed’ (Syd. Soc. Lex.).
*3. Chem. A metal or other [[chemical]] substance not disengaged from its native [[state]] of combination. Also attrib. Obs.
*4. fig. A [[thing]] in its rudimentary stage or first beginning; a germ; that which is still in [[idea]] as opposed to what has become actual in [[fact]].
:b. in embryo: in an undeveloped stage; ‘that is to be’. [? orig. Lat., from EMBRYON.]
*5. attrib. and Comb., as embryo-chick, -child, -germ, -life, -plant, -stage, -state; also embryo-bud, ‘an adventitious bud, when enclosed in the bark, as in the cedar of Lebanon’ (Syd. Soc. Lex.); embryo-cell, the first cell of the fecundated animal ovum; also in Bot. the germ in the embryo-sac of ferns, mosses, etc.; embryo-sac, Bot., a cavity in the ovule or the archegonium of a plant, within which the embryo is produced.
===Adjective===
[From the attrib. use of the n.] That is still in germ; immature, unformed, undeveloped.
[[Category: Biology]]
[[Category: General Reference]]
An '''embryo''' (irregularly from [[Greek]]: ἔμβρυον, plural ἔμβρυα, lit. "that which grows," from en- "in" + bryein "to swell, be full"; the proper [[Latin]]ate form would be embryum) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In [[human]]s, it is called an embryo until about eight weeks after fertilization (i.e. ten weeks LMP), and from then it is instead called a [[fetus]].
The development of the embryo is called embryogenesis. In [[organisms]] that reproduce [[sexual]]ly, once a sperm fertilizes an egg cell, the result is a cell called the zygote that has half of the DNA of each of two parents. The resulting embryo derives 50 percent of its genetic makeup from each parent. In plants, animals, and some protists, the zygote will begin to divide by mitosis to produce a multicellular organism. The result of this [[process]] is an embryo.
==Definition==
===Noun===
*1. The offspring of an [[animal]] before its birth (or its emergence from the egg): a. of man. In mod. technical [[language]] restricted to ‘the ftus in utero before the fourth month of pregnancy’ (Syd. Soc. Lex.) (now, before the third month).
::b. of animals.
*2. Bot. ‘The rudimentary plant contained in the seed’ (Syd. Soc. Lex.).
*3. Chem. A metal or other [[chemical]] substance not disengaged from its native [[state]] of combination. Also attrib. Obs.
*4. fig. A [[thing]] in its rudimentary stage or first beginning; a germ; that which is still in [[idea]] as opposed to what has become actual in [[fact]].
:b. in embryo: in an undeveloped stage; ‘that is to be’. [? orig. Lat., from EMBRYON.]
*5. attrib. and Comb., as embryo-chick, -child, -germ, -life, -plant, -stage, -state; also embryo-bud, ‘an adventitious bud, when enclosed in the bark, as in the cedar of Lebanon’ (Syd. Soc. Lex.); embryo-cell, the first cell of the fecundated animal ovum; also in Bot. the germ in the embryo-sac of ferns, mosses, etc.; embryo-sac, Bot., a cavity in the ovule or the archegonium of a plant, within which the embryo is produced.
===Adjective===
[From the attrib. use of the n.] That is still in germ; immature, unformed, undeveloped.
[[Category: Biology]]
[[Category: General Reference]]
