名詞 pica:

1. a linear unit (1/6 inch) used in printing
   同義詞：em, pica em
2. magpies
   同義詞：genus Pica
3. eating earth or clay or chalk; occurs in some primitive tribes or sometimes in cases of nutritional deficiency
   同義詞：geophagy, geophagia

pica

n.Printing （名詞）【印刷術(shù)】

A printer`s unit of type size, equal to 2 points or about !/' of an inch.
2點(diǎn)活字：打印機(jī)鉛字大小的單位，相當(dāng)于2點(diǎn)或大約!/'英寸
An equivalent unit of composition measurement used in determining the dimensions of lines, illustrations, or printed pages.
2點(diǎn)活字的字行長度：排版計(jì)量的等義單位，相當(dāng)于2點(diǎn)活字長度，用來確定行與行之間、插圖與插圖之間或打印頁之間的距離
A type size for typewriters, providing ten characters to the inch.
打印機(jī)活字的尺碼，每英寸字行十個(gè)字體

來源：
Probably from Medieval Latin poca [list of church services (perhaps from the typeface used to print it)]
可能源自 中世紀(jì)拉丁語 poca [日課規(guī)則書（可能源于用來打印2點(diǎn)活字的活字版面）]

pica
pica 2

n.（名詞）
An abnormal craving or appetite for nonfood substances, such as dirt, paint, or clay.
異食癖，異嗜癖：對于非食物性物質(zhì)、如灰塵、漆或泥土的不正常的渴求或食欲

來源：
New Latin poca
現(xiàn)代拉丁語 poca
from Latin [magpie (from its omnivorous nature)]
源自 拉丁語 [鵲，喜鵲（源于其雜食性）]