词根词缀：circum-
【来源及含义】Latin: around, about, surrounding, closed curve, circling, circular on all sides; literally, "in a circle"
【相关词根词缀】 Related "around, round, surrounding" units: ambi-; ampho-; circ-; cyclo-, -cycle; gyro-; peri-.
【同源单词】Antarctic Circumpolar Current, circuit, circuitous, circuitously, circuitousness, circuitry
词根词缀：nano- [NA noh], nan-, nanno-, -nania
【来源及含义】Greek: dwarf, dwarfish; pygmy; "little old man;" very small or tiny; also, a decimal prefix used in the international metric system for measurements
【相关描述】This prefix is used in the metric [decimal] system as billionth [U.S.] and thousand-millionth [U.K.], 10-9 [0.000 000 001]. The metric symbol for nano- is n.
【相关词根词缀】Related "few, small, less, little" word units:
micro-;
mini-;
mio-, meio-;
oligo-, olig-.
Related "metric" families:
yotta;
zetta;
exa;
peta;
tera;
giga;
mega;
kilo;
hecto;
deka;
deci;
centi;
milli;
micro;
pico;
femto;
atto;
zepto;
yocto.
【同源单词】bionanotechnology, nanandrous, nanism, nanization, nannandrous, nannofossil