achromatinn.
/aˈkrəʊmatɪn/, /eɪˈkrəʊmatɪn/, U.S. /æˈkroʊməd(ə)n/, /eɪˈkroʊməd(ə)n/ Cell Biology.
The nuclear material in a eukaryotic cell which does not readily stain with basic dies (cf. achromatic adj. 2). Opposed to chromatin.
ΚΠ
1882 Jrnl. Microsc. Soc. Jan. 37 The nucleus is composed of two substances, of which one is stained by dyes, the other not, and he accordingly calls the former chromatin, the latter achromatin.
1887 A. C. Haddon Introd. Study Embryol. ii. 19 At the stage when the chromatin is equatorially situated..the achromatin forms a well-marked spindle-shaped bundle of fibres.
1953 Trans. Amer. Miscrosc. Soc. 72 242 At the start of mitosis the chromatin leaves the periphery of the nucleus and loosely fills the space around the achromatin endosome.
1978 Metabolism 27 1183 The ovoid lobated nucleus is mainly in the center of the cell and displays the usual pattern of chromatin–achromatin.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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n.1882- leapfrogging
- leapfrogs
- leapful
- leapgate
- leaphead
- leaphole
- leaping
- leaping ague
- leaping cucumber
- leaping gout
- leaping hare
- leaping house
- leaping spider
- leaping time
- leaping-bar
- leaping-fish
- leaping-head
- leaping-horn
- leaping-on-stone
- leaping-pole
- leapingbar
- leapingfish
- leapinghead
- leapinghorn
- leapingly